Plz almost done with this stupid topic

Factor and solve to find roots x squared -x - 90 =0

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?

Coleen made 1,000 bracelets to sell at a flea market. she sold each bracelet for $5.50. if she sold all of the bracelets, how much money did coleen make? $550 $5,500 $55,000 $550,000