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Alinara [238K]
3 years ago
14

A square painting has a side length of 18 inches. What is the area of the painting?

Mathematics
2 answers:
WINSTONCH [101]3 years ago
8 0
Hi! So because all the sides of the square are the same side, you multiple two of the side lengths together, so the area of the painting is 18 x 18 = 324  :) Good luck and do well in school!!!!!!!!
Aloiza [94]3 years ago
4 0
A square is a shape with equal sides so if the length is 18 in, the width would also be 18 in.
And to find the area of a square you multiply LxW 
So, you multiply 18x18= 324 in
The area of the painting would be 324 inches. 
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An article describes an experiment to determine the effectiveness of mushroom compost in removing petroleum contaminants from so
alexgriva [62]

Solution :

Let p_1 and p_2  represents the proportions of the seeds which germinate among the seeds planted in the soil containing 3\% and 5\% mushroom compost by weight respectively.

To test the null hypothesis H_0: p_1=p_2 against the alternate hypothesis  H_1:p_1 \neq p_2 .

Let \hat p_1, \hat p_2 denotes the respective sample proportions and the n_1, n_2 represents the sample size respectively.

$\hat p_1 = \frac{74}{155} = 0.477419

n_1=155

$p_2=\frac{86}{155}=0.554839

n_2=155

The test statistic can be written as :

$z=\frac{(\hat p_1 - \hat p_2)}{\sqrt{\frac{\hat p_1 \times (1-\hat p_1)}{n_1}} + \frac{\hat p_2 \times (1-\hat p_2)}{n_2}}}

which under H_0  follows the standard normal distribution.

We reject H_0 at 0.05 level of significance, if the P-value or if |z_{obs}|>Z_{0.025}

Now, the value of the test statistics = -1.368928

The critical value = \pm 1.959964

P-value = $P(|z|> z_{obs})= 2 \times P(z< -1.367928)$

                                     $=2 \times 0.085667$

                                     = 0.171335

Since the p-value > 0.05 and $|z_{obs}| \ngtr z_{critical} = 1.959964$, so we fail to reject H_0 at 0.05 level of significance.

Hence we conclude that the two population proportion are not significantly different.

Conclusion :

There is not sufficient evidence to conclude that the \text{proportion} of the seeds that \text{germinate differs} with the percent of the \text{mushroom compost} in the soil.

8 0
3 years ago
How much will you have to pay back in total if you borrowed $400 from the bank for a year at 12%
vodka [1.7K]
1) figure out interest amount

400x.12= 48

2) add interest and loan amount

400+48= 448
3 0
2 years ago
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julia-pushkina [17]

Answer: Sabre read the most

Step-by-step explanation:

35% of 40 is 14, which is more than 12

6 0
3 years ago
What is the equation of the axis of symmetry?
AlexFokin [52]

Answer:

x = 2

Step-by-step explanation:

Since the parabola is opening vertically up then the equation of symmetry is vertical and of the form x = c

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equation of axis of symmetry is x = 2

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