If we were to continue sampling every possible sample of size The average time spent by construction workers who work on the weekends is 7.9 hours. Assume the distribution of weekend work time is approximately normal with a standard deviation of 0.8 hours.

a. Find the probability that an individual who works at that trade works fewer that 8 hours on the week- end. Now a sample of 40 construction workers is randomly selected and we wish to determine the proba- bility that the mean of the sample will be less than 8 hours.
b. Draw a normal distribution curve and shade the area corresponding to the situation.
c. Find the probability that the mean of the sample will be less than 8 hours.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

answer: what in the world is this

step-by-step explanation:

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6