Which set of side lengths form a right triangle? 7 cm, 8 cm, 10 cm

3 ft, 6 ft, 5 ft

14 m, 20 m, 25 m

10 cm, 6 cm, 8 cm

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

Asap! i'm not good math and i'm lost.

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.