Answer:
Step-by-step explanation:
z score= x - mean/standard deviation
1.20= x -100/15
18= x -100
118=x
z score= x - mean/standard deviation
0.5=x-73/4
2=x-73
75= x
Answer:
Option A) Combined, with a saving of x-y cents
Step-by-step explanation:
We are given the following in the question:
The rate to mail a package is x cents for first pound and y cents for each additional pound.

Weights of packages =
3 pounds and 5 pounds
Cost of combined package:
Total weight = 8 pounds

Cost of sending separately:

Difference between cost of sending the packages separately and combined

Thus, sending the packages combined is a cheaper method with a saving of (x-y) cents
Thus, the correct answer is:
Option A) Combined, with a saving of (x-y) cents
Answer:
The answer is 4th Choice
Step-by-step explanation:
Answer:
$8.88
Step-by-step explanation:
24yds needed = 864 inches
864/150 = 5.76 so he'll need 6 spools
6x 1.48 = $8.88
Because you are multiplying you add the exponents together. -5+6=1 so you only have 3 to the power of one left over or just 3 in the parentheses. Then multiply 2x3 to get 6.