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AleksAgata [21]
3 years ago
13

you are saving $30 each month. you have a goal to accumulate $700 in savings. how long will it take you?

Mathematics
2 answers:
allsm [11]3 years ago
7 0
It will take you 23 1/3 months or rounding 23 months the way you get the answer is you is you divide the goal over the amount of money each month 700/30.
MrMuchimi3 years ago
5 0
$700 ÷ $30 = approximately 23 months
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A random survey of 1000 students nationwide showed a mean ACT score of 21.1. Ohio was not used. A survey of 500 randomly selecte
vodka [1.7K]

Answer:

We conclude that the mean Ohio score is below the national average.

Step-by-step explanation:

We are given that a random survey of 1000 students nationwide showed a mean ACT score of 21.1. Ohio was not used.

A survey of 500 randomly selected Ohio scores showed a mean of 20.8. The population standard deviation is 3.

<u><em>Let </em></u>\mu<u><em> = mean Ohio scores.</em></u>

So, Null Hypothesis, H_0 : \mu \geq 21.1      {means that the mean Ohio score is above or equal the national average}

Alternate Hypothesis, H_A : \mu < 21.1      {means that the mean Ohio score is below the national average}

The test statistics that would be used here <u>One-sample z test statistics</u> as we know about population standard deviation;

                    T.S. =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n}}}  ~ N(0,1)

where, \bar X = sample mean Ohio score = 20.8

            \sigma = population standard deviation = 3

            n = sample of Ohio = 500

So, <u><em>test statistics</em></u>  =  \frac{20.8-21.1}{\frac{3}{\sqrt{500}}}  

                              =  -2.24

The value of z test statistics is -2.24.

<em>Now, at 0.1 significance level the z table gives critical value of -1.2816 for left-tailed test.</em><em> Since our test statistics is less than the critical values of z as -2.24 < 1.2816, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which </em><em><u>we reject our null hypothesis</u></em><em>.</em>

Therefore, we conclude that the mean Ohio score is below the national average.

4 0
3 years ago
Ryan bought 4 2/3 pounds of apples for $0.75 per pound. how much did he pay for the apples
Nina [5.8K]

Answer:

$3.50

Step-by-step explanation:

4 2/3 x 0.75 = $3.50

4 0
3 years ago
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Find the length of AB¯¯¯¯¯¯ to the nearest hundredth.
alukav5142 [94]

Answer:

it will be b

Step-by-step explanation:

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3 years ago
When 70,000 is written as 7.0 10^{n} what is the value of n ?
Lelechka [254]
70 000=7\cdot10^4\\ \\840000000=8,4\cdot10^8\\ \\0,004=4\cdot10^{-3}\\ \\0,000000123=1,23\cdot10^{-7}
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On a 50-question test, a student answered 5 questions incorrectly. What percent did the student answer correctly? A. 45% B. 90%
nadya68 [22]
Hey there,

Pretend that 50 = 100

And that 5 = 10.

I did a 100 test unit test, and I got 10% wrong.

If you think about this, the answer would be 90%

So, it's the same in this case,

50 in half of 100

5 is half of 10.

So . . .

This would mean that your correct answer would be 90% because 5 in this case is to be considered to be 10.

Your correct answer is  . . . . 

\boxed{\boxed{90 \ would \ be \ your \ correct \ answer }}

Hope this helps
~Jurgen
7 0
3 years ago
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