Question

Please really need help on these two

Answer 1

See below,please

Explanation:

Question 1

Because we know

`b = \pi {r}^(2) + c`

So,

`\pi {r}^(2) = b - c`

`{r}^(2) = (b - c)/(\pi)`

`r = + or - \sqrt{ (b - c)/(\pi) }`

Hence, the last choice is the right answer.

Question 2

Because we know

`d = \sqrt{ (h)/(6.752) }`

So,

`(h)/(6.752) = {d}^(2)`

`h = 6.752 * {d}^(2)`

Hence, the First choice is the right answer.