Please answer this correctly without making mistakes

55 bridesmaids want to make 325 325 decorations for a wedding. each decoration takes about 212 2 1 2 minutes to make. which response gives the best estimate for the amount of time each bridesmaid will spend making decorations?

Which one ? is the answer and how to find this answer

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20