The first three digits of a 10-digit phone number make up the area code for the number. How many 10-digit phone numbers are possible (in general) if the area codecannot be 911 (since these are reserved for emergency use)?

Q: Walter is creating a 5 digit code for an electronic lock. He can use any number, but cannot use the…

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Q: The sum of the digits of a two-digit number is 9. If 27 is added to it, the digits of the number get…

A: Let the two digit number be xy. It is given that the sum of the digits is 9. Hence x+y=9.

Q: The number 6545 can be written as a product of a pair of positive two-digit numbers, what are these…

A: solution:-The given number =65456545=5×7×11×17the two numbers are two digit numberthenthe number…

Q: If 28 less than five times a certain number is 232. What is the number?

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Q: A number is divisible by 2 if

A: A number is divisible by 2 if

Q: I just need to know why they are all classified that way. An explanation why each number is…

A: We classified the given numbers. Note : As per our Guidelines , we can solve first three subparts .…

Q: determine the number of five-digit integers that contains the digit six exactly once

A: Explanation of the answer is as follows

Q: The telephone prefix for a university is 408. The prefix is followed by four digits.…

A: Given There are 10 options for each of the 4 spots,

Q: Joaquin drove from Newark, NJ, to New Brunswick during rush hour at an average speed of 3030miles…

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Q: A census taker visited the Jones household, and asked Mrs. Jones for the age of her three sons. Mrs.…

A: After knowing that the ages multiply to 76, here is a complete list of the possibilities:Ages:…

Q: I was looking for help on #46, not #45

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Q: If a is an even number, then a³ is an even number.

A: Here, We have given that (a) is an even number then we have to prove that (a3)  is also an even…

Q: Jill needs to make a password for her email account. The password must be all digits and contain…

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Q: Professor Chauvet wants to know how quickly her students can type out a text message. So that…

A: The objective is to identify which of the given choices is best measure to describe the center of…

Q: As I went to pay for my coffee, I saw a sign saying, “Win free coffee for a year! Choose 4 different…

A: The objective of this question is to find out the total number of different 4-digit passcodes that…

Q: ome reason the correct answer is 50178

A: Mean (μ) = $43,000 Standard Deviation (σ) = $5,600

Q: 2 1 -7 6 2 -4 3 -5

A: Now , we will solve  given  matrix

Q: A machine stores a floating point number in 7 bits. The first bit is for the sign of the number, the…

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Q: need to be converted to base 10

A: In Mayan numeral system a line represents 5 and a dot represents 1 and it is a base 20 numeral…

Q: The space shuttle can travel at approximately 410,000 miles per day. If the shuttle could travel to…

A: Given that the statement is , The space shuttle is travel at approximately = 410,000 miles per day…

Q: If $2001 = 398 and ä2001 = 104, find i.

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Q: Use the numbers 5 and 4 to illustrate the commutative property of multiplication.

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Q: In a certain year,a ski had 1,082,549 skiers. In the number 1,082,549 what digit names the number of…

A: It is given that a ski had 1,082,549 skiers in a certain year.

Q: B. Find the value of x on numbers 144

A: We will solve the value x.

Q: What single addition or subtraction can be performed on a calculator to change the first number to…

A: We have to find the required number .