Solve the problem.How long must $4000 be in a bank at 7% compounded annually to become $6872.74? Round to the nearest year.
A. 9 yr
B. 10 yr
C. 8 yr
D. 7 yr
Answer: C
Mathematics
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Factor the polynomial completely. If the polynomial cannot be factored, say it is prime.x2 - x - 63
A. (x + 7)(x - 9) B. prime C. (x - 63)(x + 1) D. (x - 7)(x + 9)
Mathematics
Factor completely. If the polynomial is prime, state so.125x2 - 5
A. 10(5x + 1)(5x - 1) B. 5(5x + 1)(5x - 1) C. 5(5x + 1)2 D. 5(5x - 1)2
Mathematics
Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.cos 65°
A. 0.42 B. -0.44 C. -0.56 D. 0.30
Mathematics
Perform the matrix operation.Let A = 
. Find 2A.
A. 
B. 
C. 
D. 
Mathematics