What is a valid card number for a MasterCard? A) 4224 1801 2345 6781 B) 4224 1801 2345 6789
C) 5424 1801 2345 6781
D) 5424 1801 2345 6789

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Step-by-step explanation:

Mastercard cards – Begin with a 5 and has 16 digits. American Express cards – Begin with a 3, followed by a 4 or a 7 has 15 digits. Discover cards – Begin with a 6 and have 16 digits. Diners Club and Carte Blanche cards – Begin with a 3, followed by a 0, 6, or 8 and have 14 digits.

a) 52 ounces

b) 24 pints

Step-by-step explanation:

A:There are 16 ounces in a pound. Thus, you can simply multiply 3.25 by 16 to get 52.

B: Simply multiply 0.15 * 20 to get 3.  Then multiply 3 by 8 to get 24.(8 pints per gallon)

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