A country has a 7 digit phone number system of the form ABC-DEFG. The first digit ‘A’ can be any number except 0 or 1. The next 2 digits, ‘B’ and ‘C’, can be any digit, except they cannot repeat. The last 4 digits can be any single digit number 0-9. How many unique phone numbers are possible?

The two cylinders are similar. if the ratio of their surface areas is 9/1.44 find the volume of each cylinder. round your answer to the nearest hundredth. a. small cylinder: 152.00 m3 large cylinder: 950.02 m3 b. small cylinder: 972.14 m3 large cylinder: 12,924.24 m3 c. small cylinder: 851.22 m3 large cylinder: 13,300.25 m3 d. small cylinder: 682.95 m3 large cylinder: 13,539.68 m3