A is inversly proportional to b. When a = 12, b = 20. determine b when a = 35.

Answer:6.9

Step-by-step explanation:

a is inversely proportional to b can be written as

a α 1/b

a=k/b k=constant

When a=12 b=20

12=k/20

Cross multiply

12 x 20=k

240=k

k=240

The relationship between a and b would be a=240/b

When a is 35

35=240/b

Cross multiply

35 x b=240

35b=240

Divide both sides by 35

35b/35=240/35

b=6.9