Write the expression in the form a + bi.
A. 6 - 7i
B. - 6 - 7i
C. 6 + 7i
D. - 6 + 7i
Answer: A
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Graph the integrand and use geometry to evaluate the integral.
A. 12 B. 24 C. 80 D. 40
Solve the problem.An object is dropped from 10 ft above the surface of the moon. How long will it take the object to hit the surface of the moon if 
A. 0.96 sec B. 1.39 sec C. 1.96 sec D. 3.85 sec
Perform the operation and give the answer as a fraction in lowest terms.
- 
A. - 
B. - 
C. - 
D. - 
Solve the problem.Suppose you would like to cross a 223-foot wide river in a boat. Assume that the boat can travel 31 mph relative to the water and that the current is flowing west at the rate of 6 mph. What bearing should be chosen so that the boat will land at a point exactly across from its starting point? Give your answer to the nearest tenth of a degree.
A. 8.9° B. 78.8° C. 7.4° D. 11.2°