1. (book question end of ch. 5 - q2): for a population with a standard deviation of o = 20,
find the z-score for each of the following locations in the distribution. (hint: take a
look at the equation for finding z-scores and figure out what information you have been
given in the question and in the following "locations in the distribution.)
a. above the mean by 5 points.
b. above the mean by 2 points.
c. below the mean by 10 points.
d. below the mean by 30 points.

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.