A seven-digit phone number in the united states consists of a three-digit exchange followed by a four-digit number.
1 answer:
10 total numbers can be used for each digit ( 0-9) except the first digit:
1st digit can be 1 of 9 numbers
other 6 digits can be 1 of 10 numbers each
multiply all the possible numbers together:
9 x 10 x 10 x 10 x 10 x 10 x 10 = 9,000,000 possible phone numbers
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Answer:
b
Step-by-step explanation:
The exact answer would be <span>392.78
An estimated value could be either 390 or 393</span>
first：76 ÷ 19/25=100
a:80 / 20 * 1 / 25 =0.16
b:80 * 5/4 =100
c:80 / 5 ÷ 1 / 4 =64
d:80 * 5/4 =100
e:80 * 4/5 =64
So I think both B and D should be the right answer
A12
Step-by-step explanation
WHAT THE F-
why are the the questions fat paragraphs my dude
