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3 years ago

A type of origami paper comes in 15 cm by 15 cm

Mathematics

1 answer:

ruslelena [56]3 years ago

8 0

Answer:

150 cm squared

Step-by-step explanation:

I guess that's the answer if I'm wrong you can tell me right away so that I can try another method thank you.

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If you bought a stock last year for a price of $147, and it has risen 17.9% since then, how much is the stock worth now, to the

zysi [14]

Answer:

This is an percentage question, meaning you have to calculate the percentage rise.

1) Do 147 * 17.9% (Which equals to 26.3 [1.d.p.])

2) 26.3 is the answer

Hope it helps! :D

5 0

2 years ago

3.) (1.012 X10-2) + (2.4X10-4)<br>

DanielleElmas [232]

Answer:

=(10.12-2)+(24-4)

=8.12+20

=28.12

6 0

2 years ago

A submarine descends to 1/6 of its maximum depth. Then it descends another 2/3 of its maximum depth. If it is now at 650 feet be

Irina-Kira [14]

Answer:

7500 feet is the lowest sea level or half of the earth

Step-by-step explanation:

mark as brainliest

8 0

1 year ago

Q1) Ms. Garcia baked a 12 pound cake for a birthday party. Bryant ate 1/4 of 1 point

olga55 [171]

Answer:

3 pounds

Step-by-step explanation:

12/4=3 (because we need to see how much bryant ate first)

12-3=9 (original - what bryant ate)

9/3=3 (what was left after bryant finish and what 1/3 of 9 is)

3 0

2 years ago

A random sample of the costs of repair jobs at a large muffler repair shop produces a mean of $127.95. and a standard deviation

lubasha [3.4K]

Answer:

$127.95-1.685\frac{24.03}{\sqrt{40}}=121.55$

$127.95 +1.685\frac{24.03}{\sqrt{40}}=134.35$

So on this case the 90% confidence interval would be given by (121.55;134.35)

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".

$\bar X=127.95$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s=24.03 represent the sample standard deviation

n represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=40-1=39$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,39)".And we see that $t_{\alpha/2}=1.685$

Now we have everything in order to replace into formula (1):

$127.95-1.685\frac{24.03}{\sqrt{40}}=121.55$

$127.95 +1.685\frac{24.03}{\sqrt{40}}=134.35$

So on this case the 90% confidence interval would be given by (121.55;134.35)

8 0

2 years ago