Step-by-step explanation:

where n is an element of Integer
* the values of sinx intersects the x-axis when sinx=0
for example:
sin0°=sin180°=sin360°=0
4%. 1/5 * 1/5 is 1/25 which equals 4%
C = (5/9)(F-32) multiply both sides by 9/5
(9/5)C = F - 32 add32 to both sides
(9/5)C + 32 = F
4/9 x 27 = girls
12 girls
5/9 x 27 = boys
15boys