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WINSTONCH [101]
3 years ago
13

Eugene wants to buy jeans at a store that is giving $10 off everything the tag on the gene is marked 50% off the original price

is $49.98 find the total cost if the $10 discount is applied before the 50% discount
Mathematics
1 answer:
Blizzard [7]3 years ago
7 0
Hello!

Subtract the $10 discount first:

49.98 - 10 = 39.98

Next, divide this price in 2 because 50% means half off:

39.98 / 2 = 19.99

So, the total cost of the jeans, after 2 discounts have been applied, is $19.99.
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Current rules for telephone area codes allow the use of digits​ 2-9 for the first​ digit, and​ 0-9 for the second and third​ dig
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Using the fundamental counting theorem, we have that:

  • 648 different area codes are possible with this rule.
  • There are 6,480,000,000 possible 10-digit phone numbers.
  • The amount of possible phone numbers is greater than 400,000,000, thus, there are enough possible phone numbers.

The fundamental counting principle states that if there are p ways to do a thing, and q ways to do another thing, and these two things are independent, there are ways to do both things.

For the area code:

  • 8 options for the first digit.
  • 9 options for the second and third.

Thus:

8 \times 9 \times 9 = 648

648 different area codes are possible with this rule.

For the number of 10-digit phone numbers:

  • 7 digits, each with 10 options.
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Then

648 \times 10^7 = 6,480,000,000


There are 6,480,000,000 possible 10-digit phone numbers.

The amount of possible phone numbers is greater than 400,000,000, thus, there are enough possible phone numbers.

A similar problem is given at brainly.com/question/24067651

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Step-by-step explanation:

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