Can y’all help me plz

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Find the solution(s) to x^2-14+49=0

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.)