you are buying shingles for a roof. each bundle with cover 27 square feet. the roof consists of two rectangular parts and each is 70 feet by 30 feet. how many bundles of shingles do you need?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Which is a graph of a proportional relationship?

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed