Students at a midtown middle school can choose their schedule from 3 math courses 3 science courses 2 social studies and 2 art. Determine the number of possible schedules that include one course in each subject area

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?