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3 years ago

Fractions that are equivent to 4/12

Mathematics

2 answers:

AysviL [449]3 years ago

8 0

Answer:

1/3 2/6

Step-by-step explanation:

FinnZ [79.3K]3 years ago

3 0

Answer:

2/6 and 1/3

Step-by-step explanation:

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A ball is thrown straight up from the top of a building 144 ft tall with an initial velocity of 48 ft per second. The height

fgiga [73]

Answer:

180feet

Step-by-step explanation:

Given the function that models the height of a ball

s(t) = 144 + 48t − 16t^2.

At maximum height, the velocity is zero ie. ds/dt = 0

ds/dt = 48 - 32t

0 = 48 - 32t

48 = 32t

t = 48/32

t = 1.5secs

Get the maximum height

s(t) = 144 + 48t − 16t^2.

s(1.5) = 144 + 48(1.5)-16(1.5)^2

s()1.5) = 144 + 72 - 16(2.25)

s(1.5) = 144 + 72-36

s(1.5) = 180 feet

Hence the maximum height attained by the ball is 180feet

6 0

3 years ago

-10 < 3x + 2 < 8 Please answer for 29 points

cupoosta [38]

Answer:

x=1 or 0

Step-by-step explanation:

because if X is 1 then 3*1 is 3 and 3+2 is five then it's bigger than -10 and smaller than 8

0*3 is 0 then 0 plus 2 is 2 which also works

6 0

3 years ago

___________ Qualitative Inferential Descriptive Quantitative statistics consists of organizing and summarizing information coll

Alika [10]

Answer:

Descriptive statistics consists of organizing and summarizing information collected, while inferential statistics use methods that generalize results obtained from a sample to the population and measure the reliability of the results.

Step-by-step explanation:

By definition, descriptive statistics summarize a given data set using measures of central tendency and measures of variability.

Measures of central tendency include:

mean.
median.
mode.

Measures of variability include:

standard deviation.
variance.
the minimum and maximum variables.

By definition, inferential statistics are used to make generalizations about a population from data samples.

For example, you might ask a sample of 100 people if they like shopping. You could make a bar chart of yes or no answers (descriptive statistics) or you could use your research and then, reason which is the percentage of the population that likes shopping (inferential statistics).

4 0

4 years ago

You were assigned 225 pages to read. You finished ¼ of them. How many pages do you have left to read?

DENIUS [597]

Answer: 169 pages

Step-by-step explanation:

225-[1/4(225)]

225-56.25 ROUND DOWN

225-56

169 pages

7 0

3 years ago

Read 2 more answers

A professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their class

KIM [24]

Answer:

We conclude that seniors skip more than 2% of their classes at 0.01 level of significance.

Step-by-step explanation:

We are given that a professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their classes.

He randomly samples a group of seniors and out of 2521 classes, the group skipped 77.

Let p = percentage of seniors who skip their classes.

So, Null Hypothesis, $H_0$ : p $\leq$ 2% {means that seniors skip less than or equal to 2% of their classes}

Alternate Hypothesis, $H_A$ : p > 2% {means that seniors skip more than 2% of their classes}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of seniors who skipped their classes = $\frac{77}{2521}$

n = sample of classes = 2521

So, test statistics = $\frac{\frac{77}{2521} -0.02}{{\sqrt{\frac{\frac{77}{2521}(1-\frac{77}{2521})}{2521} } } } }$

= 3.08

The value of the test statistics is 3.08.

Now at 0.01 significance level, the z table gives critical value of 2.3263 for right-tailed test. Since our test statistics is more than the critical value of z as 2.3263 < 3.08, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that seniors skip more than 2% of their classes.

6 0

3 years ago