The mathcounts sprint round competition consists of 30 problems with a time limit of 40 minutes. suppose you complete 20 sprint round problems in 25 minutes. on average, how many times as long will you be able to spend on each remaining problem than you did on each of the first 20? express your answer as a common fraction.

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?