Specifications for an aircraft bolt require that the ultimate ten- sile strength be at least 18 kN. It is known that 10% of the bolts have strengths less than 18 . 3 kN and that 5% of the bolts have strengths greater than 19 . 76 kN. It is also known that the strengths of these bolts are normally distributed.

a. Find the mean and standard deviation of the strengths.
b. What proportion of the bolts meet the strength specification?

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

d.) yes, because the volume of the cone is greater than the volume of the sphere

step-by-step explanation: