Question

Annie estimates that the height of a bookcase is 78.25 in. The actual height is 75.50 in. To the nearest tenth of a percent, what is the percent error in Annie's estimate? Enter your answer in the box.

Answer 1

Answer  

Find out the  percent error in Annie's estimate .

To prove

Formula

$Percentage\ error = \frac{error\times 100}{exact\ value}$

As  error = approx value -  exact value

As given

Annie estimates that the height of a bookcase is 78.25 in.

The actual height is 75.50 in.

approx value = 78.25 in.

actual value = 75.50 in.

error = 78 .25 - 75 .50

        = 2.75

put in the formula

$Percentage\ error = \frac{2.75\times 100}{75.50}$

$Percentage\ error = \frac{27500}{7550}$

Percentage error = 3.64 % (approx)

Therefore the Percentage error be 3.64 % (approx).

Answer 2

3.6 is my answer.....