Given P(A) = 0.54, P(B) 0.3 and P(B|A) 0.4, find the value of P(A and B), rounding to the nearest thousandth, if necessary.

David must install fencing around a lot that is shaped like a right angle. the side of lot that runs east-west is 200 ft long. the side of the lot runs north-south is 125 ft long. calculate how many feet of fencing he will need to surround the entire lot.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.