Respuesta :

7.8

They give you the radius, which is half the diameter.

3.9 * 2 = 7.8

arj1ta

answer:

1. 7.8 km

2. 17 ml

step-by-step explanation:

  • for the first one, we are given the radius
  • know that, the diameter is two times bigger than the radius
  • so, for both of these we have to multiply what is given by 2

1 — 3.9 X 2 = 7.8 km

2 — 8.5 X 2 = 17 mi

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