Andy painted 400 square feet in 3 hours. At that rate, how many cars could they wash in 7 hours? *

It will take 5.4 hour to paint 720 square feet

Step-by-step explanation:

The question should be like this"Andy painted 400 square  feet in 3 hours. How long  would it take him to paint  720 square feet?"

In 3 hours = 400 square  feet is painted

1 square feet is painted in

To find time to paint 720 square feet multiply the above term by 720 as follows :

So, it will take 5.4 hour to paint 720 square feet.

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.