How much change will you get back if you bought three 0.78 chocolate bars and paid with a $5 bill?

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.