Find the surface area of a square prism with a side measure of 15

1350 surface area

Step-by-step explanation:

A = 2a^2 + 4ah

A = 2(15)^2 + 4(15)(15)

A = 2(225) + 4(225)

A = 1350

 1350 surface area

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24