A salesman makes 0.0025r of revenue. A soccer team won 45%, lost 40%, and tied 3. Total games? Mary spends 60% of \$300 for a camera at 25\% off. Original price?
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Reference An incident ball A of mass 0.10 kg is sliding at 1.4m/s on the horizontal tabletop of negligible friction shown above. It makes a head-on collision with a target ball B of mass 0.50 kg at rest at the edge of the table. As a result of the collision, the incident ball rebounds, sliding backwards at 0.70m/s immediately after the collision.
a. Calculate the speed of the 0.50 kg target ball immediately after the collision. The tabletop is 1.20 m above a level, horizontal floor. The target ball is projected horizontally and initially strikes the floor at a horizontal displacement d from the point of collision.
b. Calculate the horizontal displacement d.
Treating circulatory disease: Angioplasty is a medical procedure in which an obstructed blood vessel is widened. In some cases, a wire mesh tube, called a stent, is placed in the vessel to help it remain open. A study was conducted to compare the effectiveness of a bare metal stent with one that has been coated with a drug designed to prevent reblocking of the vessel. A total of 5330 patients received bare metal stents, and of these, 844 needed treatment for reblocking within a year. A total of 1122 received drug-coated stents, and 148 of them required treatment within a year. Can you conclude that the proportion of patients who needed retreatment differs between those who received bare metal stents and those who received drug-coated stents? Let p1 denote the proportion of patients with bare metal stents who needed retreatment and p2 denote the proportion of patients with drug-coated stents who needed retreatment. Use the α=0.05 level of significance and the P-value method with the TI-84 Plus calculator. Part: 0 / 4 Part 1 of 4 State the appropriate null and alternate hypotheses.
H0:
H1: This hypothesis test is a (Choose one) test.
For questions 20-21, solve for x. Assume segments that appear to be tangent are tangent.
21.
x2=11(11+8)x2=11⋅19x2=209x=209 22. NO 23. If DE and EF are tangent to circle G, find EF.
4x+2310x−19 24. Find the perimeter of △PQR.
5.9
12.2
27.4
Salaries payable
is a liability account with a normal debit balance
is a liability account with a normal credit balance
is an expense with a normal debit balance
is an expense with a normal credit balance
Debit Accounts Receivable \82,680;creditSales$78,000;creditSalesTaxesPayable\4,680.
The relationship between intensity, I, of light (in lumens) at a depth of x feet in Lake Erie is given by the following equation.
log121=−0.00235x What is the intensity at a depth of 35 ft ? The intensity at a depth of 35 ft is approximately □ lumens.
(Type an integer or decimal rounded to three decimal places as needed.)
ion 10.2 Homework
Question 8, 10.2.21-T
HW Score: 69.48%,15.29 of 22 points
Part 1 of 5
Points: 0.29 of 1
Save Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high school students were not being taught enough math and science. A recent survey found that 216 of 700 parents of children in high school felt it was a serious problem that high school students were not being taught enough math and science. Do parents feel differently today than they did twenty years ago? Use the α=0.1 level of significance. Because np0(1−p0)=□□ 10, the sample size is □5% of the population size, and the sample □ the requirements for testing the hypothesis □ satisfied.
(Round to one decimal place as needed.)
The equations for free fall near the surfaces of two celestial bodies in outer space (s in meters, t in seconds) are: Celestial Body A, s=2.15t2; Celestial Body B, s=13.89t2. How long would it take a rock falling from rest to reach a velocity of 27.1secm on each celestial body?
It would take ___ sec on Celestial Body A and ___ sec on Celestial Body B.
(Round to three decimal places as needed.)
Triangle HNR is shown where point K is the centroid, KW=(2y−8.9),KH=(4.5w−5.9), KR=(0.5y+3.2),KN=(5x−5.2),KD=(9w−23.2), and KT=(7.1x−11.8). Which of the following statements are true? Select all that apply.
The value of x is 2 .
The value of y is 6 .
The value of y is 8.1 .
The value of w is 3.8 .
The length of KH is 7.6 .
The length of KN is 6.3 .
The length of KR is 10.6 .
Given the coordinates of two points (105,120) and (102,100), find the equation of the line in slope-intercept form.Use the formula for the slope m=x2−x1y2−y1 to find the slope of the line.Then, use one of the points to solve for the y-intercept b by substituting the values into the equation y=mx+b.
Naomi practices the piano 770 minutes in 2 weeks. If t represents the total time she practices for any number of days, d, write a proportional equation for t in terms of d that matches the context. Answer
Attempt 1 out of 2
t=□
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A building has 6 homes per floor and 3 floors. On the first floor, there are 4 penguins per home. On the second and third floor, there are 3 penguins per home. Which equation can we use to find p, the total number of penguins living in the building? Choose 1 answer:
(A) 3×6×(4+3)=p
(B) (4×6)+(3×6)×3=p
(c) (4×6)+(3×6)+(3×6)=p
1. A copper wire has a resistivity of
1.68×10−8Ω⋅m at 20∘C. The temperature coefficient of resistivity for copper is 0.00393 per ∘C, calculate the resistivity of the wire at 50∘C.
2. The conduction electrons in a metal such as silver may be heated as though composing a gas confined in a metallic lattice, write λ and v for the electron's mean free path and mean thermal velocity respectively. Obtain a formula for the electric conductivity, σ of the metal.
7 A nutrition label states that there ore 36 g of carbohydrates in each serving. This accounts for 12% of the daily value. How many grams of carbohydrates are recommended per day?
Practice 6
In compressing a gas, 355 J of work is done on the system. At the same time, 185 J of heat escapes from the system. What is ΔU for the system?
A baseball bat contacts a 0.145−kg baseball for 1.3×10−3s The average force exerted by the bat on the ball is 8900 N . Part A If the ball has an initial velocity of 44m/s toward the bat and the force of the bat causes the ball's motion to reverse direction, what is the ball's speed as it leaves the bat? Express your answer with the appropriate units.
vf= Valuet ss
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Question 4 of 10
Complete the square to solve the equation below.
x2−10x−2=17 A. x=6+30; x=6−30
B. x=5+29; x=5−29
C. x=5+44; x=5−44
D. x=5+55; x=5−55
SUBMIT
You make street signs. This morning, you need to make a triangular sign and a circular sign. The material used to make the signs costs $17.64 per square foot. Based on the designs, the base of the triangular street sign is 3 feet, and the height is 2.6 feet. The circular street sign has a radius of 1.5 feet. What is the total cost to make the two signs?
\$124.63
\$193.42
\$234.97
\$262.22
\$303.76
Question 19
of 42 Step 2 of 2
01:58:46 Consider the following equation:
x+1−2x=−2+x+31 Step 2 of 2: Solve the equation, if possible. If there is a solution, express your answer as either an integer or a simplified fraction. AnswerHow to enter your answer (opens in new window) 2 Points
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Keyboard Shortcuts Separate your answers with commas, if necessary.
Selecting a radio button will replace the entered answer value(s) with the radio button value. If the radio button is not selected, the entered answer is used.
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Unclogging Arteries Research done in the 1930s by the French physiologist Jean Poiseuille showed that the resistance R of a blood vessel of length / and radius r is R=r4kl, where k is a constant. Suppose a dose of the drug TPA increases r by 8%. How will this affect the resistance R ? Assume that l is constant.
RdR=
Instruction: The paper consists of THREE questions. Answer question ONE (1) and any one from the rest questions
1 Find the equivalent stiffness for the following structure shown in Fig Q1. Neglect the mass of the bars. (10 marks) Fig Q1
2 Determine the displacement x velocity x and acceleration xx¨ of a spring-mass system with ωn=10rad/s for the initial conditions x0=0.05m and x0=1m/s. ( 10 marks ) 3 A circular cylinder of radius r and mass m is connected by spring stiffness k to a rigid support as shown in Fig Q2. Find the natural frequency of free oscillations using energy method (10 marks) Fig Q3
La relación entre la cantidad total gastada en comida y bebida por los clientes que un camarero atiende en un restaurante durante una semana dete camarero durante esa semana se puede modelar mediante la ecuación y=0,2x+300, donde x es la cantidad gastada por los clientes en dólares camarero en dỏlares. ¿En cuánto aumenta el ingreso semanal del camarero por cada $500 que gastan sus clientes durante esa semana?
$100$300$400$500
Solve the following exponential equation. Express the solution set in terms of natural logarithms or common logarithms. Then, use a calculator to obtain a decimal approximation for the solution.
e1−8x=551 The solution set expressed in terms of logarithms is □β.
(Use a comma to separate answers as needed. Simplify your answer. Use integers or fractions for any numbers expression. Use In for natural logarithm and log for common logarithm.)
A 1-kg mass and a 2-kg mass are placed as shown to the left of the beam's center. How far from the right of center should a 3-kg mass be placed to balance the beam?
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
E. 50 cm
F. 60 cm
G. None of the above.
38. Which equation represents the ellipse with
vertices at (3,−5) and (3,9) and with a minor axis of
length 10 units? A. 25(x−3)2+49(y+2)2=1 B. 49(x−3)2+25(y−2)2=1 C. 25(x−3)2+49(y−2)2=1 D. 100(x−3)2+196(y−2)2=1
Given a cone with a height or radius of 18yd, find the surface area and volume of the cone. Use the following formulas: 1. Surface Area (A) of a cone:
$ A = \pi r (r + \sqrt{h^2 + r^2})
\]
where \(r\) is the radius of the base and \(h\) is the height. 2. Volume (V) of a cone:
$ V = \frac{1}{3} \pi r^2 h
\] Determine whether the given measurement of 18yd is the radius or the height, and use it to calculate the surface area and volume. If only one measurement is given, assume it is the radius and provide the formulas for both scenarios.
2. [0/4 Points]
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PRACTICE ANOTHER The graph of the equation x2=4py is a parabola with focus F(x,y)=(□ ) and directrix y=□ focus F(x,y)=(□ ) and directrix y=□ .
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Suppose that $7000 is invested at an interest rate of 5.2% compounded continuously. What is the doubling time? A=7000e(0.052t)2=e0.052tln(2)=0.052tt=0.052ln(2) 3=(1.01)1125/4 Equation:
log3(x+2)=4 Solve the equation. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution set is {}.
(Type an integer or a simplified fraction.) B. There are infinitely many solutions. C. There is no solution.
Given the equation below, determine which type of conic section it represents, then write the equation in standard form. Your options are circle, hyperbola, ellipse, or parabola.
4547=y+644x−23x2
Question 10
0/6 pts
2
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Part 1 of 4 Which of the following scenarios for triangle ABC will lead to the ambiguous case when solving using the Sine Law?
Given angle A and sides a and b
Given sides a, b, and c
Given angles A and B and side C
Given angle A and sides b and c
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A certain mutual fund has net assets of $1,359,600. One share of this fund has a net asset value of $11.33. How many shares make up the fund?
a. 833
b. 120,000
c. 1,359,600
d. 15,404,268 Please select the best answer from the choices provided
(9) A body weighing W newton is placed on a smooth plane inclined at 45∘ to the horizontal
kept in equilibrium under the action of a horizontal force of magnitude 33 newton , then
the weight of the body W = ........... newton.
(a) 38
(b) 33
(c) 46.66
(d) 75.15
Part 2. Solve the following absolute value equations. Show all work and box your final answer. Remember to verify the solution types. 7. 2∣β+5∣=7 10. 31∣g+2∣−4=g+1
SUBMIT Lila Koepke's savings account with $6625 pays 5.3% interest compounded quarterly. If she makes no deposits or withdrawals, how much interest will the account earn in 2.5 years? [from Lesson 5.6] How much money did they make in interest? \\square$
(round your answer to two decimal places and do not include the dollar sign in your answer)
Question 2
The figure shows the viewing screen in a double-slit experiment. Fringe C is the central maximum.
A
B
C
D
E
a) What will happen to the fringe spacing if the wavelength of the light is decreased?
b) What will happen to the fringe spacing if the spacing between the slits is decreased?
c) What will happen to the fringe spacing if the distance to the screen is decreased?
d) Suppose the wavelength of the light is 510 nm. How much farther is it from the dot on the screen in the center of fringe E to the left slit than it is from the dot to the right slit?
a) What is the width, in metres, of the building in real life?
b) The real building is 6.8 m tall. What is the height of the drawing of the building, in centimetres?
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