Answer:
Step-by-step explanation:
Given that Student scores on exams given by a certain instruc-tor have mean 74 and standard deviation 14.
Group I X Group II Y
Sample mean 74 74
n 25 64
Std error (14/sqrtn) 2.8 1.75
a) P(X>80) =
b) P(Y>80) = 
c) X-Y is Normal with mean = 0 and std deviation = 
P(X-Y>2.2) = 
d) 
Answer:
648 m
Step-by-step explanation:
if i understand correctly you're multiplying all these number together. so 9 times 6 is 54. 54 times 3 is 162. 162 times 4 is 648.
If you got this answer from a calculator, it rounds the last decimal point because there is not enough room on it to show that it is a repeating decimal.
Really, the decimal is .666666666666...... , or 2/3
This is one of the most common repeating decimals that will come up in later math practices. It would be a helpful conversion to memorize.
Hope this helped!! :)
If a cone and cylinder have bases with equal areas and both have identical heights then the volume of the cone is one third the volume of the cylinder
Answer:
- 1700: $50
- 2000: $60
- 7000: $90
Step-by-step explanation:
You can read the answers from the graph. Find the usage on the horizontal scale, and look at the vertical scale to find the corresponding charge.
__
<h3>1700 gallons</h3>
The value 1700 is between 1000 and 2000, so will be between 1 and 2 on the horizontal scale. The graph is flat in that region. The charge is $50.
__
<h3>2000 gallons</h3>
The graph has a jump at 2 on the horizontal scale. The solid dot tells you that the charge is $60.
__
<h3>7000 gallons</h3>
At 7 on the horizontal scale, the graph is increasing from 80 to 100. At 7000 gallons, the line passes through the grid intersection indicating the charge is $90.