Perform the indicated operation and simplify. Write the answer in the form a + bi.6i(7 - 6i)
A. 42i - 36i2
B. 42i + 36i2
C. 36 + 42i
D. 42i - 36
Answer: C
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Solve the problem.If a ball is thrown upward at 64 feet per second from the top of a building that is 120 feet high, the height of the ball can be modeled by 
feet, where t is the number of seconds after the ball is thrown. After how many seconds does the ball reach its maximum height?
A. 4 sec B. 3.8 sec C. 2 sec D. 1 sec
Give the maximum number of zeros the polynomial function may have. Use Descarte's Rule of Signs to determine how many positive and how many negative zeros it may have.f(x) = x8 - 9
A. 8; 1 positive zero; 1 negative zero B. 8; 1 positive zero; 0 negative zeros C. 8; 0 positive zeros; 1 negative zero D. 8; 0 positive zeros; 0 negative zeros
Determine whether the Law of Sines or the Law of Cosines should be used to begin to solve the given triangle. Do not solve the triangle.
A. Law of Sines B. Law of Cosines
Write the number as a product of primes.84
A. 2 ? 2 ? 3 ? 5 B. 2 ? 2 ? 2 ? 3 ? 7 C. 2 ? 2 ? 3 ? 7 D. 2 ? 3 ? 7