So You have to add 110+550 cell phones because they both have defects and by finding out how many more have defects you have to multiply by 4 to get 330 phones so It will look like this. < 110+550*4 because the problem is asking you to figure out how <em> many more cell phones have defects so by multiplying by 4 that would be your answer. I hope this helped!!! (":</em>
