Doors for the small cabinets are 11.5 inches long. doors for the large cabinets are 2.3 times as long as the doors for the small cabinets. how many large doors can be cut from a board that is 10 feet long?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Which one ? is the answer and how to find this answer

Cal's go cart has a gas tank with the dimensions shown below. he uses a gas can that holds 11 gallon of gas, to fill the go cart tank. 11 gallon = 231 inches^3 how many full gas cans will it take to fill the go cart's gas tank?