The average cost of an American wedding in 2019 was $38,700 with a standard deviation of
$3,250. Assume the variable is normally
distributed. What's the probability that a
random sample of 40 weddings would have a
mean cost of more than $38,000?

i am thinking c. sorry if im wrong .

step-by-step explanation:

the answer is c.

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.