It is believed that 18% of Americans have allergies. A two year college student is thinking about going to medical school and is wondering if it is higher where he lives as he feels like he knows many people with allergies. He randomly selected 140 people from his contacts at his college. What is the probability of him getting a sample in which 20% or more of them have allergies if in fact 18% of Americans (as well as his contacts) have allergies?

triangle and cube

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

14

step-by-step explanation:

14

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.