If a = (4,-5) and (7,-9), what is the length of line ab?

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?

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

As a salesperson you get $53/day and $3.75/ each sal you make. if you want to make at least $128 in one day, how many sales would you need to make? a 10b 15c 20d 25