The first month Tan had his new phone, he downloaded 5 apps on it. Six months later, he has 22 apps on his phone. What is the percent ncrease in the number of apps Tan has on his phone?

What is the range? can’t seem to find it out

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25