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Question 1 of 5Solve each Variation Problem
y varies directly with x2. If y = 2, when x = 5, find y when x = 10.
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$\frac{17}{5}$$
B
$$14$$
C
$$20$$
D
$$8$$
E
$$98$$
Question 2 of 5Solve each Variation Problem
y varies inversely with x3. If y = 3, when x = 3, find y when x = 5.
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$\frac{81}{225}$$
B
$$\frac{729}{125}$$
C
$$729$$
D
$$\frac{27}{625}$$
E
$$\frac{81}{125}$$
Question 3 of 5Solve each Variation Problem
y varies jointly with x2,z2, and q2. If y = 72, when x = -1, y = 3, and q = 2, find y when x = -3, y = -1, and q = 4.
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$2560$$
B
$$\frac{1589}{139}$$
C
$$1525$$
D
$$1024$$
E
$$288$$
Question 4 of 5Solve each Variation Problem
For a given interest rate (r), the simple interest earned (I) in a savings account varies jointly with principle (p), and time (t) (simple interest formula: I=prt). If a $15,000 investment earned $2250 after 3 years, how much would $25,000 earn over 11 years?
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$\$13,\hspace{-.15em}750$$
B
$$\$19,\hspace{-.15em}105$$
C
$$\$12,\hspace{-.15em}005$$
D
$$\$18,\hspace{-.15em}925$$
E
$$\$9822$$
Question 5 of 5Solve each Variation Problem
Over a specified distance (d), the speed of a car (r) varies inversely with the amount of time traveled (t) (distance formula: d = rt). If a high performance car goes a set distance in 2 hours at 130 mph, what speed is needed to travel the same distance in 40 minutes?
Finish »
Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$525\hspace{.25em}mph$$
B
$$800\hspace{.25em}mph$$
C
$$390\hspace{.25em}mph$$
D
$$225\hspace{.25em}mph$$
E
$$318\hspace{.25em}mph$$

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