Question

When getting into shape by exercising, the subject’s maximum recommended number
of heartbeats per minute (h) can be determined by subtracting the subject’s age (a)
from 220 and then taking 75% of that value. This relation is expressed by which of the
following formulas?
A. h = .75(220 – a)
B. h = .75(220) – a
C. h = 220 – .75a
D. .75h = 220 – a
E. 220 = .75(h – a)

Answer 1

h=220-a then how do i sho the % part of it

Answer 2

to me it looks like a

Answer 3

think is a