Answer:
Option C
Step-by-step explanation:
Given
Mean= μ=60
and
Standard Deviation= σ=5
In order to calculate the percentage of students between 55 and 65, we have to calculate z-score for both
z-score for 55=(55-60)/5
=(-5)/5
=-1
The area to the left of z-score -1 is 0.1587
z-score for 65=(65-60)/5
=5/5
=1
The area to the left of z-score 1 is 0.8413
Area between z-scores of 55 and 65=0.8413-0.1587
=0.6826
Converting into percentage
=0.6826*100
=68.26%
Option C is the correct answer ..
Answer: 24 points
Work Shown:
k = amount of points Katrina scored
k = 8
s = amount of points Sarah scored
s = 3k, since she scored three times as many
s = 3*8
s = 24 points
Answer:
c= -1/3
Step-by-step explanation:
First, you would subtract the m from the other, canceling them. Then, you would divide by -12 to isolate the c, which gets you -4/12, which simplifies to -1/3.
The percent change between the temperature at noon and the temperature at 5:00 p.m. is -20%
The percent change is the relative change between two quantities expressed in percentage.
Given that the At noon, the temperature was 80°F while At 5:00 p.m., the temperature was 64°F. Hence:
Percent change = [(64°F - 80°F) / 80°F] * 100%
Percent change = -20%
Therefore the percent change between the temperature at noon and the temperature at 5:00 p.m. is -20%
Find out more at: brainly.com/question/17968508
Answer:
3
Step-by-step explanation:
9/4÷3/4
9/4 ×4/3
which would equal 3
