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3 years ago

12+98= really confused on this one

Mathematics

2 answers:

kipiarov [429]3 years ago

7 0

Answer:

12+98=110

Step-by-step explanation:

Lilit [14]3 years ago

7 0

Answer:

12 + 98 = 110

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What is 6.302 rounded to the nearest tenth?

solmaris [256]

Answer:

6.3

Step-by-step explanation:

$\huge \: 6.302 \approx \: 6.3$

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4 years ago

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One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the tea

zzz [600]

Answer:

a) 1.9

b) 3.25

c) 1.5

d) -5.25

Step-by-step explanation:

We are given the following in the data:

4, 7, -1, 1, 0, 5, -3, 2, -1, 6, 5, -2

a) Mean change score

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{23}{12} = 1.9$

b) standard deviation for this population

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

Sum of differences = 126.92

$S.D = \sqrt{\dfrac{126.92}{12}} = 3.25$

c) median change score

Sorted data: -3, -2, -1, -1, 0, 1, 2, 4, 5, 5, 6, 7

$Median:\\\text{If n is odd, then}\\\\Median = \displaystyle\frac{n+1}{2}th ~term \\\\\text{If n is even, then}\\\\Median = \displaystyle\frac{\frac{n}{2}th~term + (\frac{n}{2}+1)th~term}{2}$

$\text{Median} = \dfrac{6^{th}+7^{th}}{2} = \dfrac{1+2}{2} = 1.5$

d) change score that is 2.2 standard deviations below the mean.

$\mu - 2.2(\sigma)\\1.92 - 2.2(3.25) = -5.25$

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3 years ago

The following figures are similar, find the value of x

iragen [17]

Answer:

x=143

Step-by-step explanation:

scale factor (if that is the correct term) is 13. you find that by matching sides to side. this means that 91/7=13, therefore you know that 4*13 is 52 and 11*13 is 143

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3 years ago

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Round 713,923 to the nearest hundred.

jeyben [28]

Answer:

713,7923 to the nearest hundred is 713,900

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4 years ago

What is the approximate volume of a cone with a height of 9 ft and radius of 3 ft? Use 3.14 to approximate pi, and express your

BartSMP [9]

Answer:
84.78 ft3

Steps:
Take note.
V = Volume
r = radius
h = height

V = (Pi) * (r^2 ) * (h/3)

V = (3.14) * (3^2) * (9/3)
V = (3.14) * (9) * (3)
V = 84.78

5 0

2 years ago