What is the best estimate for the liquid volume of a small cartoon of milk

Brent wants to know what is 5 x 1/2

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)

Yvaries directly as x. y =90 when x=6. find y when x=13