Which of these four sets of side lengths will form a right triangle? set 1 square root of 2 cm, 9 cm, square root of 7 cm. set 2 2 in, square root of 5 in, 9 in. set 3 square root of 6 mm, 2 mm, 10 mm set 4 square root of 2 ft, square root of 7 ft, 3ft

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.