Write the complex number in polar form. Express the argument in degrees.12 - 16i
A. 20(cos 53.1° + i sin 53.1°)
B. 20(cos 233.1° + i sin 233.1°)
C. 20(cos 126.9° + i sin 126.9°)
D. 20(cos 306.9° + i sin 306.9°)
Answer: D
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Solve the initial value problem.Differential Equation: 
= i + (7t3 - 5t)j + 
kInitial Condition: r(0) = 2j + (ln 6)k
A. r(t) = ti + 
j + ln(t + 6)k
B. r(t) = i + 
j + (ln 6)k
C. r(t) = ti + 
j + (ln t)k
D. r(t) = ti + 
j + (ln 6)k
Solve the inequality.For the function h(x) = 
, solve h(x) < 0.
A. (-?, 2) ? (6, ?) B. (-?, 2] ? [6, ?) C. [2, 6] D. (-?, 0) ? (2, 6)
Solve the problem.What will be the amount in an account with initial principal $9000 if interest is compounded continuously at an annual rate of 7.25% for 7 years?
A. $14,950.20 B. $9000.00 C. $5066.20 D. $9676.74
Solve the problem.In a course with 300 students, 10% received an A on the final exam. How many students earned an A?
A. 30 B. 300,000 C. 300 D. 10