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3 years ago

Please help me please help me

Mathematics

1 answer:

romanna [79]3 years ago

8 0

2/3 * 2 = 4/6

4/6 + 1/6 = 5/6

1 - 5/6 = 1/6

750*6 = 4500

Hope this helps! :)

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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

Rewrite the following linear equation in slope intercept form.<br> Y-5=3(x+1)

jarptica [38.1K]

Y=3x+8

Step-by-step explanation:

The slope is 3

Slope Intercept form is Y=Mx=b

5 0

3 years ago

Read 2 more answers

Graph the equation on the coordinate plane. Y= 1/2x

svetoff [14.1K]

Go over 2 x units for every 1 y unit

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3 years ago

Help plz:)))I’ll mark u Brainliest

babunello [35]

Answer:

h = 9

Step-by-step explanation:

cylinder A = $\pi$ $3^{2}$ *4 = 113.0973355 $m^{3}$

Cylinder B = 113.0973355 $m^{3}$

113.0973355 $m^{3}$ = $\pi$ $2^{2}$ *h

113.0973355 $m^{3}$ / 4 $\pi$ = h

8.999999999998 = h

I think b/c of the rounding error of rounding off pi, that h= 9

5 0

2 years ago

The next four batters on a baseball team have hitting percentages of 0.400, 0.325, 0.250, and 0.300, respectively. The team curr

Travka [436]

In order to the fourth player has the opportunity to bat, he/she needs that the three previous players make hit.

The joint probability of all three first batters make a hit is the product of their hitting percentages:

0.400 * 0.325 * 0.25

Pass the decimal numbers to fractions:

4/ 10 * 325/1000 * 25/100 = 32,500 / 1,000,000

Now simplify the fraction (divide numerator and denominator by 2500):

32,500 / 2,500 = 13

1,000,000 / 2,500 = 400

Then, 32,500 / 1,000,000 = 13 / 400

Answer: 13 / 400

3 0

3 years ago