Wrapping paper is on sale at 3 rolls for 4.25. How many rolls can Danika buy with $20? (i've been searching all around the internet for the answer but i can't seem to find one similar to the answer my teacher gave me)

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

We just started the introduction into circles and i have no idea how to do this.