Question

Does anyone know this

Answer 1

4.9 (rounded)

Explanation:

a^2 + 1^2 = 5^2

a^2 + 1 = 25

- 1 - 1

= a^2 = 24

`√(a^2 = 24)` = 4.9 (rounded)

Answer 2

a=170

Explanation:

180-6=174mil

round to 170.