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maks197457 [2]
3 years ago
5

The U.S. Postal Service is to deliver a letter to a certain postal ZIP 4 code. Find the probability that the ZIP 4 code is corre

ct if the sender (a) randomly chooses the code, (b) knows the five-digit code but must randomly choose the last four digits, and (c) knows the five-digit code and the first two digits of the plus 4 code.
Mathematics
1 answer:
Svet_ta [14]3 years ago
3 0

Answer:

State City ZIP Code(s)

Arizona (AZ) Phoenix 85001 thru 85055

Arkansas (AR) Little Rock 72201 thru 72217

California (CA) Sacramento Los Angeles Beverly Hills 94203 thru 94209 90001 thru 90089 90209 thru 90213

Colorado (CO) Denver 80201 thru 80239

Step-by-step explanation:

Hope This Helps!!!!!!!

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1. Side lengths of 15, 36 and ______ would form a right triangle. *
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Step-by-step explanation:

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3 years ago
What is the roots of f(x)=-x^2-6x-14
Nutka1998 [239]

Answer:

x=-3\pm i \sqrt{5}

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Standard Form: ax² + bx + c = 0
  • Quadratic Formula: x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}

<u>Algebra II</u>

  • Imaginary roots: √-1 = i

Step-by-step explanation:

<u>Step 1: Define function</u>

f(x) = -x² - 6x - 14

<u>Step 2: Set up</u>

  1. Set equation equal to 0:                    -x² - 6x - 14 = 0
  2. Factor out -1:                                       -(x² + 6x + 14) = 0
  3. Divide both sides by -1:                      x² + 6x + 14 = 0

<u>Step 3: Define variables</u>

a = 1

b = 6

c = 14

<u>Step 4: Find roots</u>

  1. Substitute:                              x=\frac{-6\pm\sqrt{6^2-4(1)(14)} }{2(1)}
  2. Exponents:                             x=\frac{-6\pm\sqrt{36-4(1)(14)} }{2(1)}
  3. Multiply:                                  x=\frac{-6\pm\sqrt{36-56} }{2}
  4. Subtract:                                 x=\frac{-6\pm\sqrt{-20} }{2}
  5. Factor:                                    x=\frac{-6\pm\sqrt{-1} \sqrt{20} }{2}
  6. Simplify:                                  x=\frac{-6\pm2i \sqrt{5} }{2}
  7. Factor:                                    x=\frac{2(-3\pm i \sqrt{5} )}{2}
  8. Divide:                                    x=-3\pm i \sqrt{5}
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3 years ago
Darling ohayo!! <br><br><br><br><br><br> AAAAAAAAAAAH
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3 years ago
Read 2 more answers
Please hellppp please help​
vfiekz [6]

Answer:

Below.

Step-by-step explanation:

a. 5 * 1000 = 5,000 micrometers

b. 5000 / 1000 = 5 kg

c. 4.23 * 10^12 = 4,230,000,000,000 picograms

d. 1.9 ^ 10^9 = 1,900.000,000 nanoseconds.

e. 2.3 million.

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4 years ago
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