Write the number "five hundredths, six thousandths, forty-two millionths" as a decimal. if you answer i will give you 25 points+brainliest !

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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?

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?