Telephone Area Codes Several years ago, the United States began running out of telephone numbers. Telephone companies introduced new area codes as numbers were used up, and eventually almost all area codes were used up. 45. (a) Until recently, all area codes had a 0 or 1 as the middle digit, and the first digit could not be 0 or 1. How many area codes are there with this arrangement? How many tele- phone numbers does the current 7-digit sequence permit per area code? (The 3-digit sequence that follows the area code cannot start with 0 or 1. Assume there are no other restrictions.)

Q: -y(0)-0, x(0) = 0, y (0) - em of differential equations can be e first order with the help of the…

A: Given as, x¨= y˙ -1 . , y¨=-x-2      u=x˙ and v=y˙       u˙=x¨  v˙=y¨

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Q: help me solve the problem number 10

A: This question can be solved using formula for reducing powers cos A2=1+cos(2A)2

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Q: Can you solve b for this question! Solve it on paper

A: We have to solve part (b) as asked.

Q: Ag Art A Wa TT

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Q: How do you solve this problem?

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Q: What are the steps to solving this problem?

A: COst function C(x) = 0.001x3+0.2x2+38x+250where x = no. of items producedNow, if x = 30 then C(x) =…

Q: How do I solve this ?

A: GIVEN: 6 - x - x2  if x ≤ 32x - 5         if x > 3

Q: please explain how to solve this problem

A: *used power rule

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Q: how do i solve this?

A: Given that: The table ,

Q: an more work be shown on how to solve this

A: By using a scalar projection to find the shortest distance from the point 1,-2, 5to the plane given…

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A: Since you have asked multiple questions in a single request, we will be answering only the first…

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A: Topic - slope of function To find slope at a point ,take two points on the line and calculate slope…

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A: The following is the formulae to calculate Weighted Average (W)…

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Q: Can how i solve these questions?

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: How do I solve this?

A: 1,2,3....,23,24,25 are called element of set S.  Hence, set S has 25 element which mean n(S) = 25…

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.