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Troyanec [42]
3 years ago
10

The expression 34−10+3+2=78 is an example of

Mathematics
1 answer:
Jobisdone [24]3 years ago
7 0

Answer: simplifying expression

Step-by-step explanation:

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Please helpppppppppppppppppppppppppp<br><br><br> show your work<br><br><br> -25 x 25
puteri [66]
-625
use long multiplication to evaluate .
8 0
3 years ago
From a large number of actuarial exam scores, a random sample of scores is selected, and it is found that of these are passing s
Mnenie [13.5K]

<u>Supposing 60 out of 100 scores are passing scores</u>, the 95% confidence interval for the proportion of all scores that are passing is (0.5, 0.7).

  • The lower limit is 0.5.
  • The upper limit is 0.7.

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of \alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of \frac{1+\alpha}{2}.

60 out of 100 scores are passing scores, hence n = 100, \pi = \frac{60}{100} = 0.6

95% confidence level

So \alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6 - 1.96\sqrt{\frac{0.6(0.4)}{100}} = 0.5

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6 + 1.96\sqrt{\frac{0.6(0.4)}{100}} = 0.7

The 95% confidence interval for the proportion of all scores that are passing is (0.5, 0.7).

  • The lower limit is 0.5.
  • The upper limit is 0.7.

A similar problem is given at brainly.com/question/16807970

5 0
3 years ago
The price of a tablet was reduced from $70 to $56. By what percentage was the price of the tablet reduced?
Komok [63]

Answer:

20%

Step-by-step explanation:

70-56=14     14/70=0.2 or 20%

8 0
3 years ago
6.15 divided by 31 rounded
nikdorinn [45]
It would be (rounded) 5
Because
31 / 6.15 = 5.04065

Hope this helped

Have a great day/night
7 0
3 years ago
Please help me with this question step by step on how to solve it. It takes the earth 24 h to complete a full rotation. If it wo
pav-90 [236]

In order to find the number of hours it takes to do the full rotation we separate into pieces the days, hours, and minutes and convert each of them separately.

using the conversion factor from days to hours we get that

1\text{day}=24\text{hours}

then we get that

38\text{days}\cdot\frac{24\text{hours}}{1day}=912hours

hours does not need a conversion factor, meaning that

10\text{hours}=10\text{hours}

continue by converting the minutes using the following conversion factor

1\text{hour}=60\min

then,

30\min \cdot\frac{1\text{hour}}{60\min }=0.5\text{hours}

To complete add all the results together

\begin{gathered} 912+10+0.5 \\ 922.5\text{hours} \end{gathered}

It takes mercury 922.5 hours to complete a full rotation.

3 0
1 year ago
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