if a varies jointly as b and c and a =13 when b=39 and c=3 ​

Sagot :

Answer:

K =1/9

Step-by-step explanation:

A= kbc

Then,

13= k(39)(3)

So,

K= 1/9 ( proportionality constant)

Equation is

A= BC/9

#Sana Nakatulong :)

#StudySmart