What is the surface area of a cylindrical ring if its outside diameter is 16mm and its inside diameter is 10mm? round your answer to the nearest hole number.
a-123mm^2
b-118mm^2
c- 92mm^2
d- 385mm^2

Abaker has 5 1/4 pies in her shop. she cut the pies in pieces that are each 1/8 of a whole pie. how many pieces of pie does she have?

Cumulative examcumulative exam active13time remaining02: 44: 18the graph represents the data cost for monthly internetservice for a cell phone.which function, c(x), represents the monthly cost in dollarsin terms of x, the number of gigabytes used in a month? cell phone internet service(15,5x + 10150,0sx522 < x < 664x115, osx< 25x + 20, 2< x< 650, 65815%,monthly cost (s)20x + 5| 50x,0 < x < 22 < x < 664x( 15x, osx< 2c(x) = 5x + 10, 2< x< 6150x, 65 x5+1234 5 6 7 8 9 10 11 12gigabytes used

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1