Sara bought 7 fish. Every month the number of fish she has doubles. After m months she will have F fish, where F = 7⋅2m . How many fish will Sara have after 2 months if she keeps all of them and the fish stay healthy?

A)196
B)28
C)20
D)11

Question

Sara bought 7 fish. Every month the number of fish she has doubles. After m months she will have F fish, where F = 7⋅2m . How many fish will Sara have after 2 months if she keeps all of them and the fish stay healthy? 

A)196 
B)28
C)20
D)11

anonymous · Answer

b=28

anonymous · Answer

how

hoblos · Answer

"m" is the number of months, so replace m by 2  and solve for F ( which is the number of fish)

hoblos · Answer

F = 7(2)(2) = ?

mathstudent55 · Answer

Start with 7 fish.
After 1 month, 7 * 2 = 14 fish
After 1 more month: 14 * 2 = 28 fish

anonymous · Answer

$$F=7\times2^{2}$$
$$F=7\times4$$
$$F=28$$