Question

Please answer it now in two minutes

Answer 1

`\boxed{3.9}`

Explanation:

The triangle is a right triangle.

Apply Pythagorean theorem.

`a^2 + b^2 = c^2`

`a^2 + 1^2 = 4^2`

`a^2 + 1 = 16`

`a^2 = 15`

`a=√(15)`

`a \approx 3.872983`

Answer 2

3.9

Explanation:

Pythagorean theorem:

a^2 + b^2 = c^2

a^2 + 1^2 = 4^2

a^2 + 1 = 16

a^2 = 15

a = sqrt(15)

a = 3.9

Answer a = 3.9 yards