Aschool survey says 45% of 90 students of the 7th grade take a bus to school. how many 7th graders are there?

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

How many $20 bills do you need to have to make $280

Student price tickets to a movie are $1 and non student tickets are $2 . 350 tickets are sold and the total amount made is $450. there were 250 student tickets sold . true or false .