Find the surface area of the prism.

Split it up, aka make a net diagarm or something whatever its called

we have
2 triangles (top and bottom)
2 side rectangles (visible ons on side)
back rectangle

area of triangle=1/2bh
b=6
h=4
1/2*6*4=12
times 2 since 2 trigangles
2*12=24

2 side rectangles
LW=A
5*10=50
times 2 since 2 of them
50*2=100

back rectangle
6 by 10
6*10=60

add everybody
24+100+60=184 cm^2

1.17+3.99a. you combine the terms with a to create 3.99 and the 1.17 stays because it has no like terms or a variable