Measurement

Problem 401

Find the function y(x)y(x) that satisfies the first-order differential equation y=ysinxy' = y \sin x, where y=πecosxy = \pi e^{-\cos x} is a solution.

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Problem 402

Find the value of f(4)f(-4) for f(x)=14x29f(x)=\frac{-14-x^{2}}{9}, rounded to the nearest hundredth.

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Problem 403

Find the degree 4 polynomial P(x)P(x) with roots at x=4x=4 (multiplicity 2), x=0x=0 (multiplicity 1), and x=2x=-2 (multiplicity 1), passing through (1,135)(1,-135).

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Problem 404

Redefine a linear function y=6x+13y=6x+13, find its inverse, and determine the relationship between the functions.
f(x)=6x+13f(x) = 6x + 13 x=(y13)/6x = (y-13)/6 g(y)=(y13)/6g(y) = (y-13)/6 gg undoes the process of ff, f=g1f=g^{-1}, ff and gg are inverses.

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Problem 405

Find the antiderivative of R(x)=100ex+5(1+ex+5)2R(x) = \frac{100 e^{x+5}}{(1+e^{x+5})^2}, where xx is the natural log of a histamine dose in mM. Evaluate the antiderivative at x=8.9x=-8.9 and round to 3 decimal places.

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Problem 406

Simplify the expression (30a0.23g)2(30 a - 0.23 g)^2.

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Problem 407

Simplify the expression (r+f+6)(r+f6)(r+f+6)(r+f-6).

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Problem 408

Rewrite parametric equations x=t,y=t2/3x = t, y = -t^2/3 in rectangular form.

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Problem 409

Graph the quadratic inequality y<2x28x12y < -2x^2 - 8x - 12. Determine which ordered pairs (x,y)(x, y) are solutions.

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Problem 410

Simplify the expression (v3f)2(v-3f)^2 and express the result as a single term.

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Problem 411

Solve the system of linear equations: x=4x = -4 and y+6.2x=13y + 6.2x = -13.

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Problem 412

Simplify the expression 12×512 \times 5. Show your work.

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Problem 413

Solve the exponential equation 9x+3=272x+49^{x+3}=27^{-2x+4} for the unknown variable xx.

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Problem 414

Calculate the ratio of input and output power in decibels, given input power is 20 W20 \mathrm{~W} and output power is 40 W40 \mathrm{~W}.

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Problem 415

Find the equation of a circle with center at (3,6)(-3, 6) given that the line 3xy5=03x - y - 5 = 0 is tangent to the circle.

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Problem 416

Find the solution set of the equation x6+4=10|x-6| + 4 = 10.

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Problem 417

Find the child's age using the dosage formula: A=100×D4×N5A = \frac{100 \times D}{4 \times N} - 5. Rearrange the formula to recover the child's age AA.

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Problem 418

Find the value of xx given the equation of a line yy1=m(xx1)y-y_1 = m(x-x_1)

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Problem 419

Find the distance represented by a 6-inch line segment on a scale drawing where 4 inches represents 25 miles.

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Problem 420

Evaluate the indefinite integral 2arccos(7x)149x2dx=\int \frac{2 \arccos (7 x)}{\sqrt{1-49 x^{2}}} d x = C$

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Problem 421

Laura has 57\frac{5}{7} jugs of water and needs 16\frac{1}{6} jugs per liter of paint. The expression to find the liters of paint she can mix is: 57÷16\frac{5}{7} \div \frac{1}{6}.

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Problem 422

Solve the equation 4x2=104x - 2 = 10 using algebra tiles. The solution is \square. (Type the value of xx.)

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Problem 423

Determine if the following polygon pairs are always, sometimes, or never similar: 40.40. two obtuse triangles 41.41. a trapezoid and a parallelogram 42.42. two right triangles 43.43. two isosceles triangles 44.44. a scalene triangle and an isosceles triangle 45.45. two equilateral triangles

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Problem 424

Résoudre l'équation x(x+7)=0x(x+7)=0.

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Problem 425

Evaluate 3x73x-7 when x=6x=6. Evaluate 6y136y-13 when y=4y=4. Evaluate xz5\frac{xz}{5} when x=5x=5 and z=5z=5.

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Problem 426

Solve the quadratic equation 49m22=7949 m^{2} - 2 = 79 for real-valued mm.

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Problem 427

Sketch the region where y=2y=2.

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Problem 428

Identificar la propiedad mostrada en la ecuación 4+(3+x)=44+(3+x)=4, que implica las propiedades conmutativa, asociativa y distributiva.

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Problem 429

Find the future cost of a CD after 12 years, given an inflation rate of 4.5%4.5 \% and a present cost of $12.95\$ 12.95. Round the answer to the nearest cent.

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Problem 430

Find the value of xx in the simplified expression gx+h3=1g6+1h3g^{x} + h^{-3} = \frac{1}{g^{6}} + \frac{1}{h^{3}}.

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Problem 431

Find tt in simplest radical form. Given: 30,60,6230, 60, \frac{6}{2} (inches).

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Problem 432

Solve the exponential equation 5x=16255^{x}=\frac{1}{625} to find the value of xx.

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Problem 433

Solve the inequality 4x61>854x - 61 > -85 for the real number xx.

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Problem 434

Solve for xx in the equation 5x=255^{x} = 25. Write the answer as an integer or simplified fraction.

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Problem 435

Multiply 4.3×494.3 \times \frac{4}{9} and round the answer to the nearest hundredth.

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Problem 436

Find the value of f(2)f(-2) when f(x)=35x+2f(x) = -\frac{3}{5}x + 2.

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Problem 437

Find the quotient of 4336\frac{43}{36} divided by 4322\frac{43}{22}, reduced to lowest terms.

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Problem 438

Find the value of yy when the line 904(38)x=14y-904-(-38)x=-14y has x=3x=-3. (Round answer to two decimal places)

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Problem 439

Solve the linear equation 28x4=x328-\frac{x}{4}=\frac{x}{3} and find the solution set.

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Problem 440

Solve the linear equation 9=5(x2)(x7)9=5(x-2)-(x-7) and select the correct solution set.

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Problem 441

Solve the linear equation 245v=824-5v=8 for the variable vv.

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Problem 442

Solve 30kx6kx=830kx - 6kx = 8 for xx.

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Problem 443

Determine the cost in 2018 of an item that cost 100in1999usingalinegraphandtwomodels:100 in 1999 using a line graph and two models: C = 1.9x + 120.4and and C = 0.03x^2 + 1.8x + 120.7,where, where Cisthecost is the cost x$ years after 2010.

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Problem 444

Find the value(s) of xx where 5(3x8)26=9(x4)+185(3x-8)-26=9(x-4)+18.

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Problem 445

Solve for the frequency ff given the equation 480f=10×N\frac{480}{f} = 10 \times N and f=50×10f = \sqrt{50 \times 10}.

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Problem 446

Solve the linear equation x+5=9x + 5 = 9 for the value of xx.

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Problem 447

Identify coefficients and constants in 6y+5+m6y+5+m. What error might Sarah make? The coefficients are 6,16,1. The constant is 55. Sarah might not include the coefficient 11.

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Problem 448

Solve the linear equation 5x7=7x135x-7=7x-13 and select the correct solution.

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Problem 449

Simplify the expression 23(34x+118)+45(212x+15)\frac{2}{3}\left(\frac{3}{4} x+1 \frac{1}{8}\right)+\frac{4}{5}\left(2 \frac{1}{2} x+15\right).

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Problem 450

Solve the equation 3x+28=2x|3x+2| - 8 = 2x for all values of xx.

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Problem 451

Analyze the effect of changing y=x3y=x^{3} to f(x)=(x+1)3f(x)=(x+1)^{3}. Identify the values most affected and describe the impact on the graph.

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Problem 452

Find the equation of the line of best fit for the data: (4, 3), (6, 4), (8, 9), (11, 12), (13, 17). Round the slope and y-intercept to 3 decimal places.

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Problem 453

Find the maximum value of the quadratic function y=3x2+12x9y = -3x^2 + 12x - 9. The vertex is at xvertex=b/2ax_{\text{vertex}} = -b/2a, and the maximum value is y=3y = 3.

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Problem 454

Simplify the expression (2)312(-2)^{3}-12 and select the correct answer.

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Problem 455

Graph the quadratic function f(x)=x22xf(x) = x^2 - 2x.

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Problem 456

Find the linear function with f(0)=6f(0)=6 and slope f=9f=-9.

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Problem 457

Find the standard form of the rectangular equation given the equations x=42tx=4-2t and y=3ty=3-t.

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Problem 458

Determine if the given ordered pairs are solutions to the systems of linear inequalities.
1. (2,0)(2,0): y>y > \$$x-5\$$ and $\$$y \leq 2x+1\$$
2. $(1,4)$: $\$$y < 2x+2\$$ and $\$$y \geq -3x+4\$$

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Problem 459

Simplify 4x36x2+7x8(7x310x25x+4)4x^3 - 6x^2 + 7x - 8 - (7x^3 - 10x^2 - 5x + 4). Find the degree of the resulting polynomial.

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Problem 460

18. Is the absolute value of -14 equal to 14? True or False.
19. What is the value of 3+(14)-3+(-14)? a) 11, b) -11, c) -17, d) -42

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Problem 461

Express a function that multiplies input xx by 4, then adds 16.

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Problem 462

Solve the linear equation 4x+8=20-4x + 8 = 20 for the value of xx.

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Problem 463

Find the second number that, when multiplied with 73\frac{7}{3}, results in an irrational product. Options: 37\frac{3}{7}, 2π2 \pi, 1, 3\sqrt{3}.

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Problem 464

Encuentra el máximo común divisor de 99 y 3636.

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Problem 465

Solve for xx in the rational equation x+13x+6=3x+2x+6x(3x+6)\frac{x+1}{3x+6}=\frac{3}{x}+\frac{2x+6}{x(3x+6)} using factoring.

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Problem 466

Determine if each number is prime or composite, and explain your reasoning. 27,19,31,38,45,53,87,9327, 19, 31, 38, 45, 53, 87, 93

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Problem 467

Find the lengths of the legs of a right triangle where the first leg is 1 cm longer than the second, and the hypotenuse is 6 cm.
First Leg: 36x2+1 cm\text{First Leg: } \sqrt{36 - x^2} + 1 \text{ cm} Second Leg: 36x2 cm\text{Second Leg: } \sqrt{36 - x^2} \text{ cm}

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Problem 468

Find the probability that 5 out of 10 randomly selected individuals in Kenya use public transportation, given 63% of the population uses public transportation.

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Problem 469

Solve for the value of 5×(38)5 \times (-38).

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Problem 470

Solve for the missing variable in the equation x6+4=5\frac{x}{6}+4=5.

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Problem 471

Find the equation of the linear function with yy-intercept (4)(-4) and xx-intercept (5,0)(5,0). f(x)=45x4 f(x) = \frac{4}{5}x - 4

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Problem 472

Given directly proportional ratios, find the missing variable y2y_2 if x1=500x_1=500, y1=250y_1=250, and x2=370x_2=370.

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Problem 473

Find the value of xx where the sum of 38\frac{3}{8} and xx is 72\frac{7}{2}.

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Problem 474

Find the product of 9x(52x)-9 x(5-2 x).

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Problem 475

Solve 125=w3-125=w^{3} for real number ww. Simplify solution(s). If no solution, click "No solution".

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Problem 476

Find the constant in the equation y=mx+by = mx + b given the graph points (1,1.5), (2,3), (4,6), (6,9).

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Problem 477

Determine if the statement is correct: Since 3x=203^{x}=20 and 3x=2433^{x}=243 are similar, they can be solved the same way.

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Problem 478

Solve for xx in the equation 78=x47 \cdot 8 = x - 4.

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Problem 479

Find the value of cosh(3ln3)sinh(3ln3)\cosh(3\ln 3) - \sinh(3\ln 3).

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Problem 480

Exercise 1: Limits 3) Write the reference limits of the function lnx\ln x 4) Using these limits, calculate the limits of the following functions at the bounds of their domain: a) f(x)=x22+lnxf(x)=x^{2}-2+\ln x b) g(x)=x2+(2lnx)2g(x)=x^{2}+(2-\ln x)^{2} c) h(x)=ln(x+2)1+x2h(x)=\frac{\ln (x+2)}{1+x^{2}} d) l(x)=x(lnx)2l(x)=x(\ln x)^{2}
Exercise 2: Derivative and sign study of the derivative Calculate the derivative function of the following functions and study the sign of the derivative: 4) f(x)=1+(lnx)2f(x)=-1+(\ln x)^{2} 5) g(x)=lnxx+1g(x)=\ln \frac{x}{x+1} 6) h(x)=lnx2x+4h(x)=\ln \left|\frac{x-2}{x+4}\right|
Exercise 3: Complex numbers 3) Solve the equation z22iz2=0z^{2}-2 i z-2=0 in the set C\mathbb{C} of complex numbers 4) Let z1z_{1} and z2z_{2} be the solutions of this equation such that Re(z1)>Re(z2)\operatorname{Re}\left(z_{1}\right)>\operatorname{Re}\left(z_{2}\right).

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Problem 481

Find the largest possible value of f(15)f(15) if f(x)f(x) is continuous and differentiable on [6,15][6,15], f(6)=2f(6)=-2, and f(x)10f'(x) \leq 10 for all x[6,15]x \in [6,15].

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Problem 482

Find the minimum degree of a polynomial with exactly two inflection points.

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Problem 483

Find the decimal value expressed in thousandths unit: 5.665.66, 10.2710.27, 3.4783.478, or 100.65100.65?

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Problem 484

Find the value of f(81)f(81) for a continuous function ff that satisfies 0x4f(t)dt+0xf(t4)dt=x\int_{0}^{x^{4}} f(t) dt + \int_{0}^{x} f(t^{4}) dt = x for all xx.

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Problem 485

Find the limit of the expression (4x5x)/(3x4x)(4^x - 5^x) / (3^x - 4^x) as xx approaches infinity.

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Problem 486

Find the solution to the equation ln(x1)=1+ln(3x+2)\ln (x-1)=1+\ln (3x+2).

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Problem 487

Find the solutions to xxe5x+2=0x-x e^{5 x+2}=0. Then find the second derivative of f(x)f(x) at x=1x=1, given f(x)+5f(x2)=f2(x)f'(x)+5f(x^2)=f^2(x) and f(1)=2f(1)=2.

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Problem 488

Evaluate the definite integral 107x1+x4dx\int_{-1}^{0} \frac{7 x}{1+x^{4}} d x and select the correct answer.

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Problem 489

Find the linear approximation of cos8\cos 8 about x0=12x_0 = \frac{1}{2} for the function f(x)=cos(2x)f(x) = \cos(2x).

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Problem 490

Find the value of 2sinh(2lnx)2 \sinh (2 \ln x) when x=ex=e.

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Problem 491

Find the inverse of the 2×22 \times 2 matrix A=[1121]A = \begin{bmatrix} 1 & -1 \\ -2 & 1 \end{bmatrix}.

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Problem 492

Find the derivative of y=csc1(secx)y=\csc^{-1}(\sec x) for 0<x<π/20<x<\pi/2.

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Problem 493

Find c12c_{12} where C=ABC = AB and A=[120341],B=[652203]A = \begin{bmatrix} 1 & -2 & 0 \\ -3 & 4 & -1 \end{bmatrix}, B = \begin{bmatrix} 6 & -5 \\ -2 & 2 \\ 0 & 3 \end{bmatrix}.

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Problem 494

Determine which statement is true for the given universal set X={1,2,3}X=\{1,2,3\} and set A={1,2}A=\{1,2\}.

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Problem 495

A manufacturer claims the mean breaking strength of new cables is greater than 1775 lbs. Test this claim using a one-tailed test with α=0.05\alpha=0.05. The sample mean is 1790 lbs and the population standard deviation is 55 lbs.
(a) H0:μ1775H_0: \mu \leq 1775 lbs, H1:μ>1775H_1: \mu > 1775 lbs (b) Use a z-test (c) Test statistic z=xˉμσ/n=1.818z = \frac{\bar{x} - \mu}{\sigma/\sqrt{n}} = 1.818 (d) pp-value =0.035= 0.035 (e) Yes, we can support the claim that the mean breaking strength is greater than 1775 lbs.

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Problem 496

Find the solution of the equation y2y1+2y3y1=1\frac{y^{2}}{y-1}+\frac{2y-3}{y-1}=1.

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Problem 497

Find the linear approximation of f(x)=x1/4f(x) = x^{1/4} at x0=2x_0 = 2. Select the correct answer.

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Problem 498

Simplify 2xy2y42x2\frac{2 x}{y^{2}} \cdot \frac{y^{4}}{2 x^{2}} and 10123\frac{1}{01}-\frac{2}{3}.

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Problem 499

Find the value of zz given a system of linear equations involving 2×22 \times 2 matrices.

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Problem 500

Find the set difference between the set of odd natural numbers less than or equal to 9 and the set {1, 2, 3, 4}.
A={x:x is odd natural number 9}A=\{x: x \text{ is odd natural number } \leq 9\} B={1,2,3,4}B=\{1,2,3,4\} AB=A-B=

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