Astudent who didn't study for the upcoming quiz decides to 'wing it' and just guess on the 10 question quiz. every question is a true/false question. what is the pobability that he will pass the quiz with a grade of at least 70%? express your answer as a percent rounded to the hundredths decimal place. include the '%' symbol.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

A. s.a.! similarity in right triangles, refer to the figure to complete this proportionc/a = a/? a.) cb.) hc.) rd.) s

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?