The circle graph below shows the number of hours per week a college student spends studying each subject of a college core curriculum. approximately what percet of these hours is spent on art and math combined? a. about 60% b. about 45% c. about 25% d. about 20%

The complete question in the attached figure

we know that

the total the hours--------------- > 9+10+6+13+5=43 hours
Art hours------------->10 
Math hours------------->9
Math and Art hours------> 10+9=19

if 43 hours ------------------> 100%
19 hours----------------------> X
X=19*100/43=44.19%---------- > Approximately 45%

the correct answer is the option B about 45%

 

It would be 15 m how i got the answer: (20x20) + b^2 = (25x25)400 + b^2 = 625625-400=225square that and get 15hope this : )