Find the inverse matrix of A.A = 
A. 
B. 
C. 
D. 
Answer: C
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Express the vector in the form ai + bj.
if P1 is the point (4, -2) and P2 is the point (6, -5)
A. v = -2i + 3j B. v = 2i - 3j C. v = -2i - 3j D. v = -i + 3j
Use values from the compound interest table to find the compound amount. Round to the nearest cent.
$1000 at 8% compounded annually for 6 years
A. $1400.00 B. $1480.00 C. $1586.87 D. $1469.33
Determine any local or absolute extrema as indicated.Estimate graphically the local extrema of 
A. Local maximum: -3.56; no local minimum B. Local maximum: -3.56; local minimum: -0.37 C. No local maximum; local minimum: -3.56 D. No local maximum; local minimum: -0.37
Solve.When a principal P earns an annual interest rate r compounded yearly, the amount A after t years is A = P(1 + r)t. How long will it take for a principal to double at 9% compounded annually? Round to the nearest whole year.
A. t ? 9 years B. t ? 7 years C. t ? 8 years D. t ? 5 years