Researchers conducted a study on post-menopausal women in a specific county to examine whether endometrial cancer was related to estrogen use. Cases of women with endometrial cancer were identified from this county, and a control group was selected matched to the case on age and length of residence in the county. Given the following observed frequencies, you need to test the claim that endometrial cancer was associated with estrogen use at the 0.05 significance level. What is the value of the appropriate test statistic

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

where are the images of the functions i can only see the question you typed.

step-by-step explanation:

pretty sure 750 each month!

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240