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1.

Write the sum using sigma notation: 9 + 15 + 21 + ... + 75 i=_Estimate the area between the x-axis and the graph of f(:c) = 9 3:2 over the interval [ 2, 1] by using the three rectangles shown here: Approximate the area under the curve graphed below from a: = 3 to a: = 8 using a Left Endpoint approximation with 5 subdivisions. Use the Left Endpoint method to approximate the area under the graph of the function f(a:) = 41n(:32) over the interval [1, 7]. Use 7 rectangles. Start by filling out the following table: Use the table to compute the approximate area (round decmials to 4 places). ~ C] Use the Right Endpoint method to approximate the area under the graph of the function m) = 1032'\" over the interval [ 2, 4]. Use 7 rectangles. Start by filling out the following table: IEIEIEI I-EIEI Use the table to compute the approximate area (round decimals to 4 places). a C] Approximate the area under the curve 3; = 3:2 + 5 from a: = U to :5 = 2 using a left sum with 4 subdivisions. Approximate the area under the curve :1; = 3:3 from :1: = 0 to a: = 3 using a Right Endpoint approximation with 6 subdivisions. Given the information below, estimate the total items sold during these 4 years using a right endpoint approximation. Year Sales per year (items/yr) 0 236 238 2 241 3 243 4 246 Total items sold = items