If the mass of a metal bar which is 3.25m long is 15 kg, find its mass per metre.

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?