Question

The area of a telescope lens is 6.668 × 103 mm2. What is the area in square feet (ft2)? Enter your answer in scientific notation

Answer 1

Answer:

$7.13\times 10^{-2}\ ft^2$

Explanation:

The area of a telescope lens is 6.668 × 10³ mm²

We need to convert the area in ft².

We know that,

$1\ mm^2=1.07\times 10^{-5}\ ft^2$

It means,

$6.668 \times 10^3\ mm^2=6.668 \times 10^3\times 1.07\times 10^{-5}\ ft^2\\\\=0.0713\ ft^2$

or

$0.0713\ ft^2=7.13\times 10^{-2}\ ft^2$

So, the required answer is $7.13\times 10^{-2}\ ft^2$.