Question

Four friends agree to save money for a graduation road trip they decided that each of them will put $.25 in the phone on the first day of Maine $.50 on the second day and $.75 on the third day and salon at the end of May there will be blank in

Answer 1

Answer:

At the end of May, the friends will have $496 with them.

Step-by-step explanation:

This question is based on arithmetic sequence.

Here a1 = $0.25\times4=1$

a2 =$0.50\times4=2$

a3 =$0.75\times4=3$

So, $d=2-1=1$

(a1=1, a2=2, a3=3, a4=4........)

The sum of the arithmetic sequence:

$S=n/2 (a1+an)$

$an=a1+(n-1)d$

=> $an=1+(31-1)1$

=> an=31

Now putting the value of an in the sum formula:

$S=31/2(1+31)$

$S=15.5\times32=496$ dollars

So, at the end of May, they will have $496 with them.