The serial number on a bill consists of a letter followed by nine digits and then a letter. How many different serial numbers are possible, given the following conditions?
A, Letters and digits cannot be repeated
B, letters and and digits can be repeated
C, The letters are non-repeated consonants and the digits can be repeated. ( Let y be a consonant)

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !

da freeck kinda math is this just drop out

step-by-step explanation:

good luck on ur quiz test or homework. have a good day : )