Estimate the sum or difference by first rounding to the nearest thousand.77,678
A. 38,200
B. 39,000
C. 38,100
D. 38,000
Answer: B
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Write the integral that gives the surface area generated when the curve is revolved about the x-axis. Do not simplify.y = tanx on 
A. 2?
dx
B. 
dx
C. 
dx
D. 2?
dx
Solve the inequality.(x + 2)(x - 4) ? 0
A. (-?, -2] or [4, ?) B. [4, ?) C. [-2, 4] D. (-?, -2]
Solve the problem.Carole's car averages 15.7 miles per gallon in city driving and 24.6 miles per gallon in highway driving. If she drove a total of 275.3 miles on 13 gallons of gas, then how many of the gallons were used for city driving?
A. 7 gallons B. 8 gallons C. 13 gallons D. 5 gallons
Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 10(cos 45° + i sin 45°), z2 = 5(cos 15° + i sin 15°)
A. 2(cos 30° + i sin 30°)
B. 
(cos 30° + i sin 30°)
C. 2(cos 45° + i sin 45°)
D. 
(cos 45° + i sin 45°)