Suppose a water tank is being pumped out at 3 l/min. the water tank starts at 10 l of clean water. water with toxic substance is flowing into the tank at 2 l/min, with concentration 20t g/l at time t. when the tank is half empty, how many grams of toxic substance are in the tank (assuming perfect mixing)?

Which expression is equivalent to 2^4y^3

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.