A tank initially contains 150 lb of salt dissolved in 400 gal of water. Saltwater containing 5 lb of salt per gal enters the tank at the rate of 5 gal per min. The mixture (kept uniform by stirring) is removed at the same rate. How many pounds of salt are in the tank after an hour?
What will be an ideal response?
1126.12 lb
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Provide an appropriate response.An 8 in. pulley turning at 800 rpm is belted to a larger pulley turning at 250 rpm. Find the size of the larger pulley using a constant of inverse variation.
A. 2.5 in. B. 25.6 in. C. 31.25 in. D. 100 in.
Solve the problem.Find an exponential function to model the data below and use it to predict what income the company should expect in its seventh year of operation. Round to the nearest tenth when necessary. 
A. 128 million B. 1.83 million C. 12.8 million D. 0.2 million
Solve the problem.If a principle of P dollars is amortized over a period of t years, and payments are made each 
th of a year, with an annual interest rate of r (as a decimal), the payment p that must be made is given by the formula 
. The total interest I that will be paid during the term of a loan is given by 
Suppose $7100 is amortized over 3 years with an interest rate of 
style="vertical-align: -4.0px;" /> and requires monthly payments. What is the total interest that will be paid during the term of the loan? A. $1051.82 B. -$5986.35 C. $808,082.45 D. -$13,238.14
Find all solutions to the following equation.
A. 
B. 
C. 
D. 
E. 