What is 78% of 30?

Pls help me with this page I used all of my points

Travka [436]

Alright so the first one involves in shading.

You can see that Jack and Renee have two bars with rectangles inside the bar.

Jack took 3/4 hours or in words, three out of four. So in Jack's bar, shade 3 boxes and leave one unshaded.

Renee took 2/3 or two out of three. Shade 2 boxes in Renee's bar and see the difference.

As you can see, Jack has more shade length than Renee and that could only mean one thing:

Jack took longer to fix the tire than Renee.

The symbol that represents this is 3/4 > 2/3

The second activity has the same case.

Water: 3/5 means that you have to shade three boxes and leave the other two unshaded.

Sports Drink: 4/6 means that you have to shade four boxes and leave the other two unshaded.

As you can see again, there is more sports drink than the water since the shade length is longer in the sports drink than on the water.

This meant that she poured in more sports drink than water.

The third activity is just as simple, you just need to visually make up your own sections. Do the shading then see which one is bigger then just input the sign (hint: the first one is < and the second one is >)

cheers

7 0

2 years ago

Use compatible numbers to estimate the quotient

maksim [4K]

Answer:

you would have to round your answers to the nearest whole number

Step-by-step explanation:

7 0

2 years ago

A trader buys pens at $44 a dozen and sells them at $20 each. Find his profit if he sells 60 pens.

Stels [109]

60 pens/ A dozen pens= 5 packs of a dozen pens
$44*5= $220 total spent
$20*60=$1200 total money a trader gets
$1200-$220=$980 in profits.

Hope I didn't mess up for your sake.

4 0

3 years ago

Jumbo eggs in Australia, on average, are supposed to weigh 68g. Margot is in charge of a quality control test that involves weig

Andrej [43]

Answer:

0.9987 = 99.87% probability that the mean weight of 4 eggs in a package is less than 68.5g

Step-by-step explanation:

To solve this question, we use the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean weight of 67g and a sample standard deviation of 1g.

This means that $\mu = 67, \sigma = 1$

Sample of 4

This means that $n = 4, s = \frac{1}{\sqrt{4}} = 0.5$

What is the probability that the mean weight of 4 eggs in a package is less than 68.5g?

This is the pvalue of Z when X = 68.5. So

$Z = \frac{X - \mu}{\sigma}$

By the Central Limit Theorem

$Z = \frac{X - \mu}{s}$

$Z = \frac{68.5 - 67}{0.5}$

$Z = 3$

$Z = 3$ has a pvalue of 0.9987

0.9987 = 99.87% probability that the mean weight of 4 eggs in a package is less than 68.5g

6 0

2 years ago

Read 2 more answers

5 2 1 2 3 3 4 5 5 4 3 3 4 5 1 2 calculate the mean of the data

MAXImum [283]

You add all of the numbers up each row and divide by how many there are so:
row one: if u add it all up it would be 10 then divide by how many there are

6 0

2 years ago