Answer: 4
Step-by-step explanation:

where

is the cumulative distribution function for the random variable

following the standard normal distribution.
Answer:
1. 32
4:4 is the same as 1:1 meaning each one gets the same
2. 40
put 1/7 equal to 5/x and cross multiply (1x=35)(35 male workers, so add 35 to 5 female workers)
3. 8
Multiply two by 4 since an hour is 15×4
4. 188
put the ratio 7/330 to 4/x (7x=1320)(x=188.57) since you can use part of a nail, round down to 188.
5. 5 1/2 pounds
multiply 1/4 by 22 which is 22/4. that is equal to 5.5
2n + 20 = -2
20 + 2 = -2n
22 = -2n
22/2 = n
11 = n