The cable television company reduced rate 20% last year . if the original service cost $20.50 what is the new cost?

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?