Given A = {a, b, c}, how many subsets does A have including ∅? a. 4 b. 7 c. 8

1 answer:

8 0

A set of n elements has $2^n$ subsets.

There are 3 elements in the set A, so the number of subsets is $2^3=8$

You can write them out:
$\{\{\}, \{a\}, \{b\}, \{c\}, \{a, b\}, \{a, c\}, \{b, c\}, \{a, b, c\}\}$

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Alex bought six books priced at $8 each. He got a discount of 20% off the total cost. How much did Alex pay for the books? Write

Yanka [14]

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3 0

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Miguel deposits $5000 in an account

jeyben [28]

Then the amount of money will he have in his account after 10 years will be $7,454.16. Then the correct option is B.

<h3>What is compound interest?</h3>

Compound interest is the interest on a loan or deposit calculated based on the initial principal and the accumulated interest from the previous period.

Miguel deposits $5000 in an account earning 4% interest compounded monthly.

Then the amount of money will he have in his account after 10 years will be

We know the compound interest formula.

$A = P (1 + r)^t$