Solve the problem using matrices.Melody has $45,000 to invest and wishes to receive an annual income of $4290 from this money. She has chosen investments that pay 5%, 8%, and 12% simple interest. Melody wants to have the amount invested at 12% to be double the amount invested at 8%. How much should she invest at each rate?
What will be an ideal response?
$9000 at 5%, $12,000 at 8%, and $24,000 at 12%
Mathematics
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A. 
B. 
C. 
D. 
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Rewrite the number in the statement in scientific notation.A computer compiles a program in 0.00000406 seconds.
A. 4.06 × 10-7 B. 4.06 × 10-8 C. 4.06 × 10-6 D. 4.06 × 105
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Use the factor theorem to decide whether or not the second polynomial is a factor of the first.3x2 + 5x + 50; x - 5
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Solve the problem.The future value of $7000 invested for 5 years at rate r, compounded annually, is given by 
Find the rate r, as a percent, that gives a future value of $9817.86. Round to the nearest whole percent.
A. 7% B. 10% C. 8% D. 6%
Mathematics