Solve the problem.If y varies directly as x, and y = 300 when x = 100, find y when x = 40.
A. 120
B. 
C. 750
D. 
Answer: A
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Factor the trinomial.24 + 5x - x2
A. (8 - x)(3 - x) B. (8 - x)(3 + x) C. (8 + x)(3 - x) D. (x + 8)(x - 3)
Solve for the specified variable.I = 
for r
A. r = 
B. r = 
- IR
C. r = 
D. r = 
Solve the problem using matrices.A chemist has prepared two acid solutions, one of which is 4% acid by volume, another 11% acid. How many cubic centimeters of each should the chemist mix together to obtain 50 cm3 of a solution that is 
acid.
A. 3.12 cm3 of 4%; 46.88 cm3 of 11% B. 20 cm3 of 4%; 20 cm3 of 11% C. No solution D. 34 cm3 of 4%; 16 cm3 of 11%
Suppose an investment is expected to generate income at the rate of
?
?
dollars/year for the next 6 years. Find the present value of this investment if the prevailing interest rate is 0.04% /year compounded continuously. Round your answer to the nearest dollar.
?
$__________
Fill in the blank(s) with the appropriate word(s).