Suppose a is directly proportional to b, but inversely proportional to c. If a = 3 when b = 5 and c =9, then what is c when b=3 and a = 4?

Guest Sep 27, 2021

#1**+1 **

a =b/c k where k is proportionality constant

ac/b = k

Sub in the values given

3*9 /5 = 27/5

Sub in the second set of numbers

4c/3 = 27/5

c = 4.05

ElectricPavlov Sep 27, 2021