A paper has an area of 84 square inches.what is the paper’s area in square centimeters

Mathematics

2 answers:

Angelina_Jolie [31]2 years ago

6 0

Answer:

546

Step-by-step explanation:

Each square inch is equal to 6.5 square centimeters so you can multiply

84 × 6.5 = 546So, the area is 546 square centimeters.

Hope this helps =>

Rainbow [258]2 years ago

5 0

Answer:

$541.93\ cm^2$

Step-by-step explanation:

<u>Step 1: Determine the area in square centimeters</u>

$84\ in^2 * \frac{(2.54\ cm)^2}{in^2}$

$84\ in^2 * \frac{(2.54)^2 * (cm)^2}{in^2}$

$84\ in^2 * \frac{6.4516\ cm^2}{in^2}$

$541.9344\ cm^2$

Answer: $541.93\ cm^2$

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7 0

2 years ago

The following prices, in dollars, of 7.5-cubic-foot refrigerators were recorded from a random sample. 314 305 344 283 285 310 3

Mariana [72]

Answer:

$t=\frac{310.9-300}{\frac{31.09}{\sqrt{10}}}=1.109$

The degrees of freedom are given by:

$df=n-1=10-1=9$

And the p value would be given by:

$p_v =P(t_{9}>1.109)=0.148$

Since the p value is higher than the significance level of 0.05 we don't have enough evidence to conclude that the true mean is significantly higher than $300 because we FAIL to reject the null hypothesis.

Step-by-step explanation:

Information given

314 305 344 283 285 310 383 285 300 300

We can calculate the sample mean and deviation with the following formula:

$\bar X =\frac{\sum_{i=1}^n X_i}{n}$