Express the given expression in simplest form with only positive exponents.(x-4y-3)(x6y-5)
A. 
B. x2y8
C. 
D. 
Answer: D
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Solve the problem.The lifespan for a pair of walking shoes is normally distributed with a mean of 
steps and standard deviation of 
steps. If a manufacture produces 6000 pairs of these shoes, how many can be expected to last for at least 732,800 steps?
A. ? 1391 pairs B. ? 1313 pairs C. ? 1205 pairs D. ? 1271 pairs
Perform the matrix multiplication.
A. Not defined
B. 
C. 
D. 
Solve the problem. Round to the nearest cent.Find the deposit required to accumulate $3400 after investing 12 years in an account that pays an APR of 5% compounded quarterly. How much is earned in interest?
A. $1872.91; $1527.09 B. $0.00; $3400.00 C. $1893.25; $1506.75 D. $6172.21; $2772.21
Assume x and y are functions of t. Evaluate dy/dt.xy + x = 12; dx/dt = -3, x = 2, y = 5
A. 9 B. 3 C. -9 D. -3