Answer:
This is because he rides 37.5 k/m every week. Multiply that by four and you get 150
X=16, y=

you can extend down a vertical line, so you know that portion of x is 7, and that side of the triangle is 9, since 45-90-45 triangles have 2 legs of equal length.
then you know the other leg of the triangle is 9, and adding 9+7 x=16. to find y you can know that 45-90-45 triangles have sides in a

ratio, so this triangle is
Volume formula of a sphere:


r³
given:
r = 3
V =


(3)³
V =

× 27

V = 36

units³ (in terms of

)
V = 113.097 units³ ≈ 113.1 units³