suppose the income tax rate is 4% determine the amount of money remaining after paying income tax on an income of $20,000 ​

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

Extra points! find the missing dimension! need asap

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?