Suppose that circles a and b have a central angle measuring 100°. additionally, the measure of the sector for circle a is 10π m2 and for circle b is 40π m2.if the radius of circle a is 6 m, what is the radius of circle b? a) 8 m b) 10 m c) 12 m d) 16 m

What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?