Answer:
85 degrees
Step-by-step explanation:
The surface area of a rectangular prism is always:
A=2(xy+xz+yz), where x, y, and z are the three dimensions of the prism.
A=2(50*90+50*3.5+90*3.5)
A=2(4500+175+315)
A=2(4990)
A=9980 mm^2
If it is area you're looking for, the answer is 7.92 cm^2, or ~7 11/12 cm^2.
Step-by-step explanation:
Simple
We will subtract
21 - 16 = 5
So 5 more students can join the class