Maria had a spool of ribbon 68 inches long. she cut the ribbon into 8 equal-length pieces. how long was each piece of ribbon? zach said the answer was 0.85 inches. is zach's answer reasonable? no

Me because some of question i don’t understand

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

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.