A roller coaster climbs 120 feet from ground level then drops 75 feet before climbing another 105 feet. How far above ground is
2 answers:
Answer:
The roller coaster is 155 feet above the ground.
Step-by-step explanation:
Given:
The roller coaster climbs 120 feet from ground level.
Then drops 75 feet
Then again climbs 105 feet
To find distance of roller coaster above the ground now we will subtract the drop in level from the rise and then add the second rise to the difference.
This can be evaluated as:
⇒
⇒
Thus the roller coaster is 155 feet above the ground.
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Answer:
78.88%
Step-by-step explanation:
We have been given that
The z-score formula is given by
For
For
Now, we find the corresponding probability from the standard z score table.
For the z score -1.25, we have the probability 0.1056
For the z score 1.25, we have the probability 0.8944
Therefore, the percent of the trees that are between 20 and 30 years old is given by
0.8944 - 0.1056
= 0.7888
=78.88%
Answer:
80.95
Step-by-step explanation:
Percentage increase = *100
=> (38-21)* 100/21 = 80.9523%
The answer round it to the nearest 100th = 80.95%