The local sports shop has backpacks on sale for $28. the original price was $40. what is the percent decrease for the backpack price ?

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

Asphere has a diameter of 10 in. what is the volume of the sphere?

What is the absolute value of the complex number -4-sqrt2i