Answer:
The correct answer is C. 1.5
Step-by-step explanation:
To find this, first find the difference from the value to the mean.
18 - 12 = 6
Now that we have this, divide it by the size of a standard deviation to find how many it is away.
6/4 = 1.5
140
Answer: 24 & 72
Step-by-step explanation: 24 + 72 = 96
24 x 72 = 1728
(3x) + (x+60) = 180
4x + 60 = 180
Subtract 60 from both sides
4x = 120
Divide 4 from both sides
x = 30
800 × ( 3.87÷ 100 ) × 1
= 30.96
