Loss of hearing can be a significant problem for older adults. A home education program has been developed to help people who are receiving hearing aids for the first time. The program emphasizes communication and social skills. To evaluate this program, quality of life scores were measured before the treatment, at the end of the program, and at the 6 month followup. Pls use the data to determine if there was a significant improvement in quality of life following the training program. Quality of life score
person before after 6 months
A 3 7 8
B 0 5 7 N=12
C 4 9 5 G=60
D 1 7 4 ∑
∑
X2=384
M=2 M=7 M=6
SS=10 SS=8 SS=10

be more specific

step-by-step explanation:

1/800 is the right answer

(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