A side view of a staircase is constructed on a coordinate plane. If each square represents 1 square unit, find the area shown. A) 4 B) 6 C) 10 D) 12

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Precalculus question, image attached.

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints