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sweet [91]
3 years ago
12

1) In a class of 30 children, 60% of the

Mathematics
2 answers:
Irina-Kira [14]3 years ago
5 0
There are 18 girls in that class
Tpy6a [65]3 years ago
4 0

Answer:

18 students in the class are girls

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Jaiden plays Fortnite everyday. On Wednesday, he bought 50 skins, but only used 27. What percentage of skins did Jaiden use?
DedPeter [7]

Answer:

54%

Step-by-step explanation:

27 / 50 * 100% = 54%

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Which expression is equivalent to -3 1/8 - 2 1/2 = ?
SashulF [63]

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-45/8

Step-by-step explanation:

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Weight of a rock: In a geology course, students are learning to use a balance scale to accurately weigh rocks. One student plans
dusya [7]

Answer:

The first student, with 20 measurements, will have the more precise interval due to the larger sample size.

Step-by-step explanation:

Margin of error of a confidence interval:

The margin of error of a confidence interval has the following format:

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In which z is related to the confidence level, s to the standard deviation and n to the sample size.

The margin of error is inversely proportional to the square root of the sample size, which means that a larger sample will lead to a lower margin of error, that is, to a more precise interval.

In this question:

One student will use 5 measurements, other 20. The first student, with 20 measurements, will have the more precise interval due to the larger sample size.

5 0
2 years ago
Simplify -6 1/4 - (-2 1/8)
OLEGan [10]
- 6   \frac{1}{4}  +  2  \frac{1}{8}

- 6   \frac{1}{4}  -  (- 2  \frac{1}{8}  )

(-6 + 2 ) + ( -\frac{1}{4}  +   \frac{1}{8} ) )

(-4) + ( - \frac{1}{8})

- 4  \frac{1}{8}
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What’s the mean of 3,9,10,14,15,16
Ostrovityanka [42]
I think it might be 11.1
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3 years ago
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