You may need to use the appropriate appendix table or technology to answer this question. A professor at a local university noted that the grades of her students were normally distributed with a mean of 79 and a standard deviation of 10. (Round your answers to one decimal place.)
(a)
The professor has informed us that 16.6 percent of her students received grades of A. What is the minimum score needed to receive a grade of A?
(b)
If 12.1 percent of her students failed the course and received F's, what was the maximum score among those who received an F?
(c)
If 33 percent of the students received grades of B or better (i. e., A's and B's), what is the minimum score of those who received a B?

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2

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.