the estimated area is 8 square units.
left point: a=x=-1
right point: b=x=2
width of each of the 3 equal rectangles: w=r/3→w=3/3→w=1
first right endpoint is x1=a+w→x1=-1+1→x1=0
second right endpoint is x2=x1+w→x2=0+1→x2=1
third right endpoint is x3=x2+w→x3=1+1→x3=2
estimated area: a≈a1+a2+a3
a≈a1+a2+a3→a≈1+2+5→a≈8 square units
answer: c 6.3 hope it
the answer is $80 / $60
answer: d) 8 students
since $200 is already covered, you would subtract 200 from the total cost to find out how much you need left.
next, you do 400/50 because each student would cover $50.
therefore, your answer is 8 students.