19. a spherical balloon has a circumference of 19cm. what is the approximate surface area of the balloon to the nearest square centimeter?
a) 114 cm^2
b) 460 cm^2
c) 361 cm^2
d) 1,134 cm^2

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

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?

The triangles are similar. what is the value of x? enter your answer in the box.