Compute dy/dx for the function.y = sinh2 9x
A. 2 cosh 9x
B. 18 sinh 9x cosh 9x
C. 2 sinh 9x cosh 9x
D. 18 cosh 9x
Answer: B
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.(8a)(5a2)
A. 40a3 B. 40a4 C. 13a3 D. 8a + 5a2
Find the solution to the system of equations by the substitution method.-7x + 7y = 21-5x - 2y = -6
A. (-1, 4) B. (0, 4) C. (-1, 3) D. (0, 3)
Write as a single logarithm.
log7 x + log7 y
A. log7 
B. log7 
C. log7 
D. log7 y
Solve the problem.The present value that will give a future value S in 4 years with interest compounded annually varies inversely as the fourth power of 1 + r, where r is the annual interest rate. If the present value of $3.71 gives a future value of $5000, what would be the present value of $10,000? Round to the nearest dollar.
A. $7 B. $8 C. $45 D. $5