Which equation represents the circle described? (in picture)

i'm not sure i believe its c or d

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?