Emma spent 42 hours on math and language arts homework last month. she spent about 29% of this total time on math estimate about how many hours were spent on math

14,21

Step-by-step explanation:

I used a proportion

49:100=x:29

x=(49*29)/100=14,21

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

the first one, all those points on the line just make a strait line.