Question

Please answer in the form of a number

Answer 1

d ≈ 8.3

Explanation:

This is kind of like the pythagorean theorem, but with one extra value. Thus,
`d^2=l^2+w^2+h^2`.

Plug in the values to get:

`d^2=2^2+7^2+4^2\\d^2=4+49+16\\d^2=69\\d=√(69) \\`

Thus d ≈ 8.3