Estimate the sum or difference by rounding each number to the nearest hundred.7,457
A. 16,700
B. 16,600
C. 17,000
D. 16,621
Answer: A
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Solve the problem.Evaluate
where R is the interior of the ellipsoid 
. Hint: Let 
and then convert to spherical coordinates.
A. 90?2 B. 120? C. 120?2 D. 90?
Multiply.2629(446)
A. 1,172,634 B. 1,182,534 C. 1,172,534 D. 1,171,534
Find the term that should be added to the expression to form a perfect square trinomial. Write the resulting perfect square trinomial in factored form.x2 + 14x
A. 49; 
2
B. 49; 
2
C. 0; 
2
D. 196; 
2
Solve the problem. Round your answer to the nearest tenth, if necessary.The formula s = 16t2 is used to approximate the distance s, in feet, that an object falls freely (from rest) in t seconds. A stuntman jumps from a rooftop 320 ft off the ground. How long will it take him, falling freely, to reach the ground?
A. About 4.5 sec B. About 20 sec C. About 71.6 sec D. About 10 sec