Jenny wants a total of 12 barbie dolls by the time she is 9 years old. right now she has 4 barbie dolls. how many more does she need?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

What is coefficient of the term of degree of degree 5 in the polynomial below

2pointswhat is the best next step in the construction of the perpendicular bisector ofab?