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Korvikt [17]
3 years ago
13

What is a valid card number for a MasterCard? A) 4224 1801 2345 6781

Mathematics
1 answer:
mart [117]3 years ago
6 0

Answer:

please mark me brainliest

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.

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Simplify the expression. Write the answer using scientific notation.
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Step-by-step explanation:

(2×10^-13)^-2 = 2^-2 × 10^(13×(-2)) = 1/4 × 10^-26

= 0.25 × 10^-26 = 2.5 × 10^-27

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Your scientific or graphing calculator can compute and display this for you.

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