Joseph bought a DVD recorder for $280. Now it is on sale for $220.Find the percent of change in the price. Round to the nearest percent.

The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.

What is the measure of angle a and angle c ?

Which of these lines passes through the point (1,-1) and has a slope of -3?