Solve the problem. Round to the nearest tenth unless indicated otherwise.The cost of stainless steel tubing varies jointly as the length and the diameter of the tubing. If a 
length with diameter 2 inches costs $48.00, how much will a 
length with diameter 
cost? Round to the nearest cent.
A. $477.60
B. $480.00
C. $485.30
D. $485.57
Answer: B
Mathematics
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Write an expression to state the problem and simplify.A stack of currency contains 50 bills. In the stack are x $20 bills. The rest are $50 bills. How much money is in the stack of bills?
A. 20x + 50(50 - x); -30x + 2500 dollars B. 20x - 50(50 - x); 70x - 2500 dollars C. 20x + 50(50 - x); 30x + 2500 dollars D. Cannot be solved
Mathematics
Solve.
log2 x + 8 = 7
A. 4
B. -4
C. - 
D. 
Mathematics
Solve the problem. Round your answer to the nearest cent.Tara invests $250 in an account paying 8.7% compounded annually. How much is in the account after 7 years?
A. $448.28 B. $449.64 C. $152.25 D. $448.80
Mathematics
Find the value(s) of the variable for which the rational expression is undefined.
A. 8, 4 B. 0, 8, -4 C. 8, -4 D. 0, 8, 4
Mathematics