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3 years ago

PLEASE HELP!!! ASAP!!!!!

Mathematics

1 answer:

Natasha2012 [34]3 years ago

6 0

The first, second, and fourth are right

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Gary went to the farmer's market on Saturday. He has no more than

kkurt [141]

Answer:

7.00+2.50x>48.00

Step-by-step explanation:

He cant spend more than 48.00 so he'll have to spend less than or equal to 48.00

8 0

3 years ago

There are 32 sixth graders and 44 seventh graders in the video gaming club. Which ratio is the greatest?

katrin [286]

I’m gonna say D hope this helps

3 0

3 years ago

The mean weight of trucks traveling on a particular section of I-475 is not known. A state highway inspector needs an estimate o

kaheart [24]

Answer:

The 95 percent confidence interval for the population mean is between 14.736 tons and 16.864 tons.

Step-by-step explanation:

We have the population's standard deviation, so we can find the normal confidence interval.

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{3.8}{\sqrt{49}} = 1.064$

The lower end of the interval is the sample mean subtracted by M. So it is 15.8 - 1.064 = 14.736 tons

The upper end of the interval is the sample mean added to M. So it is 15.8 + 1.064 = 16.864 tons

The 95 percent confidence interval for the population mean is between 14.736 tons and 16.864 tons.

4 0

3 years ago

The price of a packet of salt goes up by 9 cents. The old price is four-fifths of the new price. Find the old and new prices.

Julli [10]

Answer:

The old price was 36 cents.

The new price is 45 cents.

8 0

4 years ago

(3.9 x 10^20)(2.3x10^60) please explain will give Brainliest answer

Lunna [17]

Answer:

(8.97x^2) *(10^80)

Step-by-step explanation:

See attachment

8 0

3 years ago