In preparation to buy a new video game that cost $65, your friend plans on saving money each month for the purchase of the game. Your friend initially starts her savings with $10 in January, and plans on saving 10% more during each successive month. After what month will your friend be able to purchase the video game?

After 20 months

Step-by-step explanation:

This is a compound growth problem which has the formula:

Where

F is future value

P is present amount

r is the rate of growth

t is the time (in months)

Future amount is $65, what he needs at-least

P is the initial amount, that is $10

r is the rate of growth, which is 10% or 10/100 = 0.1

t is time in months, what we need to find

Substituting and solving we get:

He would need 19.64 months to save up at-least 65. So, that means, he would need 20 months

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.