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WHAT IS RHE NUMBER IN SCIENTIFIC NOTATION? 0.0765

Andreas93 [3]

In order to write in scientific notation you have to write an expression with a whole number times 10 to a certain exponent. In this case the nearest whole number would be 7.65 and you have to move the decimal place twice to the left to get the desired number. Thus, the exponent would be a negative number. The final answer is : 7.65 x 10^-2.

8 0

3 years ago

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Here it is. 10 points

Diano4ka-milaya [45]

OK. So first, slope = rise/run. This can be calculated with any 2 points from the graph above.

I will use points (24, 168) and (8, 56).

Slope = (168 - 56) / (24 - 8)

Slope = 7

Since the y-intercept is 0, the equation is y = 7x

B should be the correct answer.

Cheers,

Brian

5 0

3 years ago

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Sakal and Roy each have a sack of 50 apples. All apples are either red or green. If Sakal has three times as many red apples as

kotykmax [81]

Answer:

Step-by-step explanation:

Sakal and Roy each have a sack of 50 apples.

All apples are either red or green.

Sakal = x

Roy = y

If Sakal has three times as many red apples as Roy does

x = 3y

and half as many green apples as Roy does,

x = 1/2y

how many red apples does Sakal have?

8 0

3 years ago

A consumer group is interested in estimating the proportion of packages of ground beef sold at a particular store that have an a

snow_tiger [21]

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16$

And rounded up we have that n=385

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})$

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by: