Step-by-step explanation:
s = top speed
p = horsepower
s = 27.3 × p^(1/6)
the exponent 1/6 means the 6th root of p.
17.
s = 27.3 × 70^(1/6) = 27.3 × 2.030094899... =
= 55.42159075... knots
18.
50 = 27.3 × p^(1/6)
50⁶ = 27.3⁶ × p
p = 50⁶/27.3⁶ = (50/27.3)⁶ = (1.831501832...)⁶ =
= 37.74367151... horsepower
