There would have to be 40 pieces of cake because 8 x 5=
40 divided by 5 would be 8 pieces for all the students :)
Answer:
The left one and middle one
Step-by-step explanation:
same angles and length-width ratios

The two other prime factors are
3 and 11
First do 10x7 =70
Since there’s 4 sides with this measure mentally do 70x8=560
560
10x8.7=87
87+560=647
647sq feet