Rita needs to buy some dog food. At the nearest store, 4 bags of dog food cost $26.8. How much would Rita spend on 8 bags of dog food?

1. what are the missing reasons in the proof 2. it's in the second picture and 3

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)

Sum is 17 and their difference is 3