Original amount 320 growth per year 5% number of years 9 whats the final amount

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

47 - 90 = 43

43 - 180 = x

x = 137