Ok so i know how to multiply in scientific notation but this one is so hard. pls and pls show your work. (5.7 x 10^7)+(1.8 x 10^8)+(1.5 x 10^8) youu

You are updating your garage and the only thing left to paint is your garage day. you're only going to paint the slide that faces the street. the garage door is 9 fert 8inches tall and 120 inches wide. you need to know the surface area of the side of the garage door to determine how much paint to buy. the hardware store sells paint by how much covers a square foot. what is the surface area you should report to the hardware store what is the answer

When y’all answer can y’all explain too !

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?