Solve the problem.If a rocket is propelled upward from ground level, its height h in meters after t sec is given by h(t) = -9.8t2 + 68.6t. During what interval of time will the rocket be higher than 
A. The rocket will be higher than 98 m for times between, but not including, 4 sec and 7 sec.
B. The rocket will be higher than 98 m for times between, but not including, 2 sec and 5 sec.
C. The rocket will be higher than 98 m for times up to, but not including, 5 sec.
D. The rocket will be higher than 98 m for times up to, but not including, 2 sec.
Answer: B
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Express the area of the region bounded by the given line(s) and/or curve(s) as an iterated double integral.The curve 
and the lines 
and 
A. 
B. 
C. 
D. 
Estimate the quotient by first rounding each number as indicated.92.19 ÷ 27.6; Estimate by first rounding each number to the nearest ten.
A. 0.3 B. 5 C. 3 D. 30
For the given matrix A, find -A.A = 
A. 
B. 
C. 
D. 
Solve the equation. 5
+ 4 = 23Round to the nearest hundredth if necessary.
A. 0.6 B. 3.8 C. -3.8 , 3.8 D. -0.6, 0.6