Using a graphing calculator

which quadratic regression equation best fits the data set?

x y
4 109
6 88
9 52
15 42
18 50
21 78
23 98

a. y = 0.728x^2 + 20.213x + 179.246
b. y = 0.728x^2 - 20.213 + 179.246
c. y = 179.246x^2 - 20.213x + 0.728
d. y = 0.728x^2 + 0.564x + 179.246

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Arecipe calls for 32 fluid ounces of heavy cream.how many 1 pint containers of heavy cream are needed to make the recipe?

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?