Henry deposited $420 into his savings account. there is a $5.00 per month service fee on the account. also, henry decides he wants to withdraw $25 a week for spending money. in how many months will he run out of money?

The answer is 4 months

Step-by-step explanation:

We consider the months is 4 weeks and the service fee will be discounted every 4 week.

Spent of each months will be  ( 25*4)+5

S=105

To see how many months will last,  we divide all the money we have by the amount we are going yo spend.  

T=420/105=4

We also can make a table,  discounting every week the amount of withdraw and service.

         Withdraw/Bank cost/ Balance  

          $420

Week 1$25$5$390

Week 2$25  $365

Week 3$25  $340

Week 4$25  $315

Week 5$25$5$285

Week 6$25  $260

Week 7$25  $235

Week 8$25  $210

Week 9$25$5$180

Week 10$25  $155

Week 11$25  $130

Week 12$25  $105

Week 13$25$5$75

Week 14$25  $50

Week 15$25  $25

Week 16$25  $0

1)is not similar since corresponding sides are not in the same ratio

2)are similar since corresponding sides are in the same ratio and corresponding angles are equal

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