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 ..
First, 90 minutes will equal 1.5 hours. And I have the formula for this is distance=time×speed, so I just take 25 divided 1.5 to get the speed she is riding which equal 16 2/3 miles per hour. Hope it help!
Whole numbers have no decimal place so answer : B D F - because they have no decimal place.
Hope this helps
Answer:
42
Step-by-step explanation:
3 x {[(12-8) x 2] + [(11 - 9) x 3]}
12-8=4 and 11-9=2.
3 x ((4 x 2) + (2 x 3))
4 x 2= 8 and 2 x 3=6.
3 x (8 + 6)
8 + 6 is 14.
3 x 14 is 42.
Answer:
x =answer is 800 m so good luck
