Plutonium-240 decays according to the function l where o
represents the quantity remaining after t years and k is the decay constant,
0. how long will it take 24 grams of plutonium-240 to decay to 20
grams?

One integer is 8 times another. if the product is 72, then find the integers

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?