A tank initially contains 75 lbs of salt dissolved in 400 gal of water. Saltwater containing 2 lbs of salt per gal enters the tank at the rate of 8 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 1/2 hour?
What will be an ideal response?
402.11 lb
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Solve the problem.Alex always takes $20 more than he anticipates needing on a date. If Alex takes $50 on his date with Judith, find the amount of money Alex anticipates needing for this date.
A. $30 B. $50 C. $20 D. $70
Write the ratio using fractional notation. Do not simplify.301 to 74
A. 
B. 
C. 
D. 
Expand the expression using the Binomial Theorem.(x2 + 3y)4
A. x8 + 9x6y + 54x4y2 + 81x2y3 + 81y4 B. x8 + 12x6y + 54x4y2 + 108x2y3 + 81y4 C. x6 + 9x5y + 54x4y2 + 81x2y3 + 81y4 D. x6 + 12x5y +18x4y2 + 12x2y3 + 3y4
Find the indicated probability.Of 1416 people who came into a blood bank to give blood, 203 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.
A. 0.194 B. 0.111 C. 0.062 D. 0.143