The figure shows a circle with radius r сm. Another circle is drawn inside the circle such that its diameter is the radius of the original circle. The process is repeated infinitely. (a) Show that the sum of the circumferences of the first 10 circles is greater than 3.996πr cm.

(b) If the radius of the first circle is 8 cm, what is the sum of the circumferences of all circles?

(Express the answer in terms of π.)

Which of the following expressions is equal to 2x^2+8

The table shows the relationship between the number of cups of cereal and the number of cups of raisins in a cereal bar recipe: number of cups of cereal number of cups of raisins 8 2 12 3 16 4 molly plotted an equivalent ratio as shown on the grid below: a graph is shown. the title of the graph is cereal bars. the horizontal axis label is cereal in cups. the x-axis values are 0, 20, 40, 60, 80,100. the vertical axis label is raisins in cups. the y-axis values are 0, 10, 20, 30, 40, 50. a point is plotted on the ordered pair 40,20. which of these explains why the point molly plotted is incorrect? (a) if the number of cups of cereal is 40, then the number of cups of raisins will be10. (b)if the number of cups of raisins is 40, then the number of cups of cereal will be10. (c) if the number of cups of cereal is 40, then the number of cups of raisins will be 80. (d) if the number of cups of raisins is 40, then the number of cups of cereal will be 80.

The reflexive property of congruence lets you say that ∠pqr ≅