Use the verbal description to write a formula for f(x). Then evaluate the function as indicated.Multiply the input by 8 and add 1 to obtain the output. Find f(2).
A. f(x) = -8x - 1; -17
B. f(x) = 8x + 1; 17
C. f(x) = 8x - 1; -15
D. f(x) = 8x + 1; 15
Answer: B
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Provide an appropriate response. The compound amount when an investment is compounded continuously is A = Peni Where A = compound amount, P = original principal, n = number of years, and i = interest rate per year. Let P = 400, I = 0.05, and n = 3, then find A.
A. $3717.87 B. $929.47 C. $464.73 D. $1,858.93
Translate the problem to a system of equations, then solve using matrices.Mardi received an inheritance of $70,000. She invested part at 10% and deposited the remainder in tax-free bonds at 8%. Her total annual income from the investments was $6400. Find the amount invested at 10%.
A. $63,600 B. $20,000 C. $40,000 D. $39,000
Solve.The function f(x) = 300(0.5)x/50 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of radioactive material in the vault after 
Round to the nearest whole number.
A. 125 pounds B. 168 pounds C. 180 pounds D. 131 pounds
Add or subtract as indicated. Simplify, if necessary.- 
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