In his free time, Gary spends 7 hours per week on the Internet and 8 hours per week playing video games. If Gary has five hours of free time per day, approximately what percent of his free time is spent on the Internet and playing video games? I need this fast! Please help!!I really need this one!

A.11%
B.43%
C.3%
D.30%

Solution:

Gary spends 7 hours per week on the internet and 13 hours per week playing video games

Therefore,

Internet = 7 hours per week

Playing video games = 13 hours per week

7 + 13 = 20

Gary has 5 hours of free time per day

1 Day = 5 hours

Thus, for 1 week ( 7 days ) = 7 x 5 = 35 hours of free time

%57 is spent on the internet and playing video games.

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify