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2 years ago

7

14

1 answer:

tatyana61 [14]2 years ago

4 0

We can display the information given as an equation:
2000 * $r^{19}$ = 4000; r = increase per annum
Now, we rearrange and solve for r:
$r^{19}$ = 2
r = $\sqrt[19]{2}$ = 1.037.....
We can now work out the increase for 5 years like so:
2000 * $r^{5}$ = 2400.205..... ⇒ $2400

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2 years ago

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marin [14]

Answer:

-2(9+32n)

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2 years ago

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How can 15/6 mixed number in simplest form

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2 years ago

How do I solve proportions? Here’s my questions: <br><br> 1. x/8=5/16<br> 2. 5/12=15/x

Flura [38]

Proportions are very simple once you get the hang of them! What you do is cross multiple. :)

1. x/8=5/16

You first start by multiplying x and 16

Then multiply 5 and 8

So now you have 16x=40

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You get: x+0.4!

2. 5/12=15/x

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2 years ago

The time needed for all college students to complete a certain paper-and-pencil maze follows a normal distribution with a popula

oee [108]

Answer:

The correct option is a

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 30\ seconds$

The standard deviation is $\sigma = 3 \ seconds$

The sample size is n = 9

The null hypothesis is $H_o: \mu = 30$

The alternative hypothesis is $H_a : \mu \ne 30$

The level of significance is $\alpha = 0.01$

The sample mean is $\= x = 31.2$

Generally the test statistics is mathematically represented as

$z = \frac{ \= x - \mu }{ \frac{\sigma}{\sqrt{n} } }$

=> $z = \frac{ 31.2 - 30}{ \frac{3}{\sqrt{9} } }$

=> $z = 1.2$

From the z table the area under the normal curve to the right corresponding to 1.2 is

$P(Z > 1.2) = 0.11507$

Generally the p-value is mathematically represented as

$p-value = 2 * P(Z > 1.2)$

=> $p-value = 2 *0.11507$

=> $p-value = 0.230$

From the value obtained w can see that

$p-value > \alpha$ hence

The decision rule is

Fail to reject the null hypothesis

The conclusion is there is not enough evidence to support the claim

6 0

3 years ago