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soldier1979 [14.2K]
2 years ago
13

If five times the square of a certain positive number is

Mathematics
1 answer:
frutty [35]2 years ago
5 0

Answer:

5 bud i think it this but i might be wrong

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it took 48 minutes to drive downtown. An app estimated it would be less than that. If the error was 20%, what was the apps estim
natulia [17]

Answer:

38.4

Step-by-step explanation:

it took 48 minutes and the app miss estimated by 9.6, which is 20% of 48. So subtract 9.6 from 48 and you will get 38.4

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Identify the coefficients in the following expression.<br> -7x + 8y - 3z + y - 9
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3 years ago
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Ariel joined a biking club . She paid $74.51 for a bike tune-up, 54.95 for a helmet, and 32.49 each for 3 bike tours. Write an e
jolli1 [7]
74.51+54.95+3(32.49)=?
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3 years ago
Write 625 using exponents as many as you can
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8 0
3 years ago
PLEASE help
astraxan [27]

Answer:

The percentage of people should be seen by the doctor between 13 and

17 minutes is 68% ⇒ 2nd term

Step-by-step explanation:

* Lets explain how to solve the problem

- Wait times at a doctor's office are typically 15 minutes, with a standard

 deviation of 2 minutes

- We want to find the  percentage of people should be seen by the

 doctor between 13 and 17 minutes

* To find the percentage we will find z-score

∵ The rule the z-score is z = (x - μ)/σ , where

# x is the score

# μ is the mean

# σ is the standard deviation

∵ The mean is 15 minutes and standard deviation is 2 minutes

∴ μ = 15 , σ = 2

∵ The people should be seen by the doctor between 13 and

   17 minutes

∵ x = 13 and 17

∴ z = \frac{13-15}{2}=\frac{-2}{2}=-1

∴ z = \frac{17-15}{2}=\frac{2}{2}=1

- Lets use the standard normal distribution table

∵ P(z > -1) = 0.15866

∵ P(z < 1) = 0.84134

∴ P(-1 < z < 1) = 0.84134 - 0.15866 = 0.68268 ≅ 0.68

∵ P(13 < x < 17) = P(-1 < z < 1)

∴ P(13 < x < 17) = 0.68 × 100% = 68%

* The percentage of people should be seen by the doctor between

  13 and 17 minutes is 68%

6 0
2 years ago
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