Pyramid a is a square pyramid with a base side length of 9 inches and a height of 10 inches. pyramid b has a volume of 1,350 cubic inches. how many times bigger is the volume of pyramid b than pyramid a? i need the answer as a percent. provide an explanation and proof .

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?