PLEASE HELP GIVING BRAINLEST PLEASE 30 POINTS
1 answer:
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Answer:
Step-by-step explanation:
Given that X the time to complete a standardized exam in the BYU-Idaho Testing Center is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes.
We have 68 rule as 2/3 of total would lie within 1 std deviation, and 95 rule as nearly 95% lie within 2 std deviations from the mean.
We have std deviation = 10
Hence 2 std deviations from the mean
= Mean ±2 std deviations
=±20
=
Below 50, 0.25 or 2.5% would complete the exam.
Answer:
Step-by-step explanation:
see the attached figure to better understand the problem
step 1
In the right triangle ADE
Find the value of h1
See the attached figure
h1=AD
Solve for h1
step 2
In the right triangle ABC
Find the value of h2
See the attached figure
h2=BC
Solve for h2
step 3
Find the height of the neighboring building
we know that
The height of the neighboring building is equal to
substitute the values
Round to the nearest tenth of a foot
