Myra's stamp collection consisted of 120 stamps in October. In March, her collection grew to 138 stamps. Find the percent increase between October and March. Myra's stamp collection consisted of 120 stamps in October. In March, her collection grew to 138 stamps. Find the percent increase between October and March. @Mathematics

Question

anonymous · Answer

assuming 5 months from the beginning of Oct to Beginning of march thats 5 month

Solve the equation
$$r ^{5}= (138/120)$$

this gives an r value of 1.028  which gives a growth of abt 2.8%

anonymous · Answer

thank you but these are the choices...15%

       9%

       18%

       12%