There are 139 more boys than girls in a school. if there are 472 boys, how many students are there in the school?

805

Step-by-step explanation:

1) Rewrite the first sentence as an equation

G+139=B

2) Define the variable B:

B=472

3) Substitute 472 as B in the first equation:

G+139=472

4) Subtract 139 from both sides:

G=333

5) Add boy and girl counts:

472+333=805

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm