Problema Solution
A is directly proportional to b. If a=6 when b=14, find a when b=21
Answer provided by our tutors
if a i directly proportional to b we can write
a = k*b, where k is a constant
if b = 14 then a = 16 that is
16 = k*14
k = 16/14
k = 8/7
thus a =(8/7)b
when b = 21
a = (8/7)*21 = 24
a = 24.