A cylindrical cannister contains three tennis balls. Assume the tennis balls touch the sides of the canister and the top and bottom with no gaps. How much empty space is in a tennis ball canister?  The diameter of one tennis ball is about 6.75 cm.

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Jack is considering a list of features and fees for current bank: jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements? a. $44 b. $104 c. $144 d. $176