If the ratio between the sides is
, the ratio between the areas will be
and the ratio between the volumes will be 
1q+2x-1 liner #1 liner # is 18% one
Answer:
Step-by-step explanation:
Use the equation
89 < 75 + 0.7*M Subtract 75 from both sides
89 - 75 < 0.7M Combine
14 < 0.7 M Divide both sides by 0.7
14/0.7 < M
20 < M
If M goes over 20 then the flat rate is cheaper.