A circle has a circumference of 181 inches and a center of (-7, 2). What is the standard form equation of this circle?
(x - 7)2 + (y + 2)2 = 81
(x + 7)2 + (y - 2)2 = 81
(x + 7)2 + (y - 2)2 =3
O x-7)2 + (y + 2)2 = 9
I need help pls

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?