Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = 5x8 + 4x6 + 8x4 + 9x2 + 7
A. 4 positive; 4 negative
B. 0 positive; 0 negative
C. 0 positive; 4 negative
D. 4 positive; 0 negative
Answer: B
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First estimate the answer. Then add or subtract to find the exact answer. Write answer as a mixed number.
A. Estimate: 50; Exact: 49
B. Estimate: 49; Exact: 26
C. Estimate: 49; Exact: 48
D. Estimate: 48; Exact: 49
Use the vertical line test to determine if the graph is a graph of a function.
A. Function B. Not a function
Determine the domain of the expression. Write the domain in interval notation.
A. (-?, 6) ? (6, ?) B. (-?, 0) ? (0, ?) C. (-?, ?) D. (-?, -6 ) ? (-6 , ?)
The effective yield is the annual rate i that will produce the same interest per year as the nominal rate compounded n times per year. For a rate that is compounded n times per year, the formula for effective yield is given as 
. Find the effective yield for a nominal rate of 9%, compounded monthly. Round your answer to two decimal places.
?
A. ?0.94% B. ?9.62% C. ?10.01% D. ?1.50% E. ?9.38%