Jenny has saved $3,800 over the last 12 months. she saved either $250 or $350 a month. during the 12 month period, how many times did jenny save $250 for the month?

Jenny save 4 times for the month

Step-by-step explanation:

Given Jenny has saved over the last 12 months.

She saved either or a month.

Let the number of months to save be x

Let the number of months to save be y

Total period is 12 month.

Jenny has saved $3,800 over the last 12 months.

Dividing both side from 50 we get,

Now Multiplying  equation 1 by 5 we get,

Now Subtracting Equation 3 by equation 2 we get,

Substituting the value of y in equation 1 we get,

∴ Jenny save 4 Months of   and 8 Months of  in a 12 month duration

(a) the volume of the cone is 20/3 in3

hence, option a is correct.