Month Cars Sold
January
10
February
12
8
March
April
15
17
May
June
22
25
18
July
August
September
October
November
20
21
22
How many cars does Charlie need to sell in December in order to meet his goal of a mean of 18 cars per month?
O A 17
B. 19
OC. 26
O D. 28

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters