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Sati [7]
3 years ago
5

Evaluate each expression please

Mathematics
1 answer:
Firlakuza [10]3 years ago
5 0
13. Is 18 15. Is 86 17 is 5 19 is 15 21 is 24 23 is 29
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−12.405 as a mixed number in simplest form.
rusak2 [61]
-12.405=-12 405/1000= 12 81/200
3 0
3 years ago
Read 2 more answers
What is the life expectancy of a circulating bill
Diano4ka-milaya [45]

Answer:

The life expectancy of a circulating coin is 25 years. The life expectancy of a circulating dollar bill is only 1/20 as long.

Step-by-step explanation:


3 0
3 years ago
The length of time that an auditor spends reviewing an invoice is approximately normally distributed with a mean of 600 seconds
Bumek [7]
Answer: 11.5% 

Explanation:


Since 1 minute = 60 seconds, we multiply 12 minutes by 60 so that 12 minutes = 720 seconds. Thus, we're looking for a probability that the auditor will spend more than 720 seconds. 

Now, we get the z-score for 720 seconds by the following formula:

\text{z-score} =  \frac{x - \mu}{\sigma}

where 

t = \text{time for the auditor to finish his work } = 720 \text{ seconds}
\\ \mu = \text{average time for the auditor to finish his work } = 600 \text{ seconds}
\\ \sigma = \text{standard deviation } = 100 \text{ seconds}

So, the z-score of 720 seconds is given by:

\text{z-score} = \frac{x - \mu}{\sigma}
\\
\\ \text{z-score} = \frac{720 - 600}{100}
\\
\\ \boxed{\text{z-score} = 1.2}

Let

t = time for the auditor to finish his work
z = z-score of time t

Since the time is normally distributed, the probability for t > 720 is the same as the probability for z > 1.2. In terms of equation:

P(t \ \textgreater \  720) 
\\ = P(z \ \textgreater \  1.2)
\\ = 1 - P(z \leq 1.2)
\\ = 1 - 0.885
\\  \boxed{P(t \ \textgreater \  720)  = 0.115}

Hence, there is 11.5% chance that the auditor will spend more than 12 minutes in an invoice. 
8 0
3 years ago
Plssssss heeeelp (NOOOOO LINKS!)
ahrayia [7]
-40) No
0) No
-5) No
13) Yes
21)Yes
8 0
3 years ago
2x−y=5 If x=4, then y=
jeka94

Answer:

Y = 3

Step-by-step explanation:

2(4) = 8

Subtract 8 on both sides

-y = -3

Y=3

4 0
2 years ago
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