Shaver Manufacturing, Inc., offers dental insurance to its employees. A recent study bythe human resource director shows the annual cost per employee peryear followed the normal probability distribution, with a mean of$1,280 and a standard deviation of $420 per year. a. What fraction of the employees cost more than $1,500 per year fordental expenses?
b. Whatfraction of the employees cost between $1,500 and $2,000 peryear?
c. Estimate the percent that did not have any dental expense.
d. Whatwas the cost for the 10% of employees who incurred the highestdental expense?

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3