Use a graphing calculator to find the inverse of the matrix. Give five decimal places, if necessary.A = 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.The length of an airconditioning filter is to be between 
and 
and its width is to be between 
and 
Express the possible areas A as an inequality and graph the values of A.
A =
area in hundreds of sq. in.
A. 300 < x < 600
A = area in hundreds of sq. in.
B. 400 < x < 700
A = area in hundreds of sq. in.
C. 400 ? x ? 700
A = area in hundreds of sq. in.
D. 300 ? x ? 600
A = area in hundreds of sq. in.
Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.(x2y5)7/4
A. x15/4y27/4 B. x35/4y7/2 C. x7/2y35/4 D. x8/7y20/7
Simplify.
A. 
B. 
C. 
D. 
Solve the problem.In a certain country, the rate of increase of the population is proportional to the population P(t). In fact, 
Suppose that initially the country's population is 50,000, and that 10 years later there are 500,000 people. Which of the following equations expresses this information mathematically?
A. 500,000 = e0.23(10) B. 10 = e2.3t C. 500,000 = 50,000e2.3 D. 500 = e2.3(50) E. none of these