The answer is
C
Hope it helped :)
The error percentage is 4.13%.
<h2>Error percentage</h2>
The amount of mistakes is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.
Given
Annie estimates that the height of a bookcase is 78.25 in.
The actual height is 75.50 in.
<h3>To find </h3>
The error percentage.
<h3>How to find the error percentage?</h3>
We know the formula for the error percentage.

The error percentage is 4.13%.
More about the error link is given below.
brainly.com/question/13286220
Answer:
the speed of the plane when there is no wind is 212.25 mi/hr
Step-by-step explanation:
Let v represent the speed of the plane without wind.
Wind speed = 20.1 mi/hr
The resultant speed with wind is;
v + 20.1 mi/hr
The resultant speed against wind is;
v - 20.1 mi/hr
Let t represent the time for the travel.
With wind;
(v+20.1)t = 630 ......1
Against wind;
(v-20.1)t = 521 ......2
Divide equation 1 by 2
(v+20.1)/(v-20.1) = 630/521
Cross multiply;
521(v+20.1) = 630(v-20.1)
Collecting like terms;
v(630-521) = 20.1(630+521)
v = 20.1(1151)/109
v = 212.25 mi/hr
the speed of the plane when there is no wind is 212.25 mi/hr
5dgji
Step-by-step explanation:
how???? ... hope it is good