Solve the problem.A package of relief supplies is dropped and moves according to the parametric equations 
and y = -4.9t2, where distances are in meters and time is in seconds. Find the magnitude and direction of the acceleration when 
A. -9.8 m/s2, 270°
B. -9.8 m/s2, 90°
C. 9.8 m/s2, 90°
D. 9.8 m/s2, 270°
Answer: D
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Solve the problem.Find the radius of gyration about the x-axis of a lamina in the first quadrant bounded by the coordinate axes and the curve 
if 
.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Solve the problem.At a store, Sam bought 4 batteries, 10 60-watt light bulbs, 44 100-watt light bulbs, 11 picture-hanging kits, and a hammer. Jennifer bought 10 batteries, 5 100-watt light bulbs, and a package of tacks. Write the information as a 2 x 6 matrix.
A. 
B. 
C. 
D. 
Write an equation of the line with the given slope, m, and y-intercept (0, b).m = 
, b = 1
A. y = 
x - 1
B. y = - 
x + 1
C. y = - 
x - 1
D. y = 
x + 1
Solve the equation and check your solution.-2.4 = 10.7 - x
A. 12.6 B. 13.1 C. 8.3 D. 7.8