Please help with part b

We have to use the summation in this case.

Step-by-step explanation:

total/frequency=mean

frequency= 2 + 8 + 4 + 10 + 6=30

0*2=0

1*8=8

2*4=8

3*10=30

4*6=24

total= 70

70/30= 7/3= 2.33333... ≈ 2 (goals cannot be in decimals!)

This should be the answer, I hope.

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

it's both, now can you answer my most recent question?