Question

A student measured the area of a bulletin board as 2.1 m squared. To find it’s area in square feet, he multiplied 2.1 by 3.28, getting an answer of about 6.9 ft squared. Explain the student’s error. What is the correct area in square feet?

Answer 1

Explanation:

Answer 2

For this case we have that the conversion from feet to meters is given by:

`1m = 3.28feet`

Then, converting the specified measure we have:

`2.1m ^ 2 (\frac {3.28feet} {1m}) ^ 2`

Rewriting we have:

`2.1m ^ 2 (\frac {3.28feet} {1m}) ^ 2 = 22.6feet ^ 2`

Answer:

the student’s error is: He forgot to square

the correct area in square feet is 22.6feet².