Write a direct variation equation, y = kx, that describes the graph. 
A. y = 
x
B. y = - 
x
C. y = 3x
D. y = - 3x
Answer: C
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Solve the problem.If the height of a rectangular solid is held constant, the volume varies jointly with the length and the width. If the volume is 180 cubic inches when the length is 9 inches and the width is 5 inches, find the volume when the length is 8 inches and the width is 6 inches.
A. 160 in.3 B. 192 in.3 C. 144 in.3 D. 216 in.3
Solve the problem.The formula 
can be used to estimate the maximum safe velocity v, in miles per hour, at which a car can travel along a curved road with a radius of curvature r, in feet. To the nearest whole number, find the radius of curvature if the maximum safe velocity is 35 miles per hour.
A. 3063 ft B. 490 ft C. 1225 ft D. 196 ft
Use identities to find the indicated value for each angle measure.tan ? = 
, ? < ? < 
Find sin(2?).
A. 
B. 
C. - 
D. - 
Find the simple interest. Round your answer to the nearest cent.Principal = $300Interest Rate = 4%Time in years = 2
A. $24.00 B. $600.00 C. $2.40 D. $37.50