Solve the problem.Suppose a tank contains 100 gallons of a solution of 10 lb of salt dissolved in water, which is kept uniform by stirring. If pure water is allowed to flow into the tank at a rate of 3 gallons per minute, and the mixture flows out at a rate of 2 gallons per minute, find an expression for the amount of salt in the tank after t minutes.
A. y = 100 (t - 100)2
B. y = 
C. y = 
D. y = 
Answer: D
Mathematics
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Solve the problem.Find the average distance from a point 
in the region bounded by 
to the origin.
A. 
B. 
C. 
D. 
Mathematics
At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Between 15.2 and 16.1 seconds
A. 50% B. 34% C. 68% D. 13.5%
Mathematics
Find the maturity value of the simple interest note.Face Value: $4,492 Length of Loan: 113 daysRate: 10%
A. $4,629.84 B. $4,632.30 C. $4,633.00 D. $4,634.98
Mathematics
Find the simple interest. Round to the nearest cent.Principal = $1,010Interest Rate = 4
%Time in years = 3
A. $13.64 B. $136.35 C. $6.73 D. $1,515.00
Mathematics