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3 years ago

Which has the same value as 15 tens

2 answers:

8 0

Hey there!

The value of 15 tens would be 15 tens added together. Instead of adding 15 to itself 15 times, the process can be shortened by using multiplication. Multiplication basically takes a number (10) and adds it together a specified amount of times (15) with only one step.

15 × 10 = 150

By the way, when multiplying something by 10, you can simply add a zero onto the end of the other number.

Hope this helped you out! :-)

Alex73 [517]3 years ago

5 0

It is 1 and one half.

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Can someone help me with this math work and please explain why the answer is what it is

Anettt [7]

Answer: 58unit²

Step-by-step explanation:

We will take 1 square as 1 unit

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4 0

2 years ago

A survey of 76 commercial airline flights of under 2 hours resulted in a sample average late time for a flight of 2.55 minutes.

nika2105 [10]

Answer:

The best point of estimate for the true mean is:

$\hat \mu = \bar X = 2.55$

$2.55-1.96\frac{12}{\sqrt{76}}=-0.148$

$2.55+1.96\frac{12}{\sqrt{76}}=5.248$

Since the time can't be negative a good approximation for the confidence interval would be (0,5.248) minutes. The interval are tellling to us that at 95% of confidence the average late time is lower than 5.248 minutes.

Step-by-step explanation:

Information given

$\bar X=2.55$ represent the sample mean for the late time for a flight

$\mu$ population mean

$\sigma=12$ represent the population deviation

n=76 represent the sample size

Confidence interval

The best point of estimate for the true mean is:

$\hat \mu = \bar X = 2.55$

The confidence interval for the true mean is given by:

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

The Confidence level given is 0.95 or 95%, th significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ . If we look in the normal distribution a quantile that accumulates 0.025 of the area on each tail we got $z_{\alpha/2}=1.96$

Replacing we got:

$2.55-1.96\frac{12}{\sqrt{76}}=-0.148$

$2.55+1.96\frac{12}{\sqrt{76}}=5.248$

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3 years ago

Find the value of 3, y, & z 35° х Z y

Pachacha [2.7K]

Answer:

Step-by-step explanation:

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3 years ago

Probability theory predicts that there is a 9% chance of a water polo team winning any particular match. If the water polo team

AlexFokin [52]

The result is B. 1638.

To calculate this, we will use both an addition and a multiplication rule. The addition rule is used to calculate the probability of one of the events from multiple pathways. If you want that only one of the events happens, you will use the addition rule. The multiplication rule calculates the probability that both of two events will occur.
First, there are two possibilities for winning exactly one match:
1. To win the first match and lose the second one.
2. To lose the first match and win the second one.

9% = 0.09 is the probability of winning. The probability of losing is 1-0.09 = 0.91. To calculate the probability of winning the first match and losing the second one and vice versa, we will use the multiplication rule:
1. 0.09 × 0.91 = 0.0819
2. 0.91 × 0.09 = 0.0819

We want to either one of these events to happen, so using the addition rule, we have:
0.0819 + 0.0819 = 0.1638

In 10,000 matches:
0.1638 × 10,000 = 1,638

4 0

3 years ago

Plz help, I am so confusedd

Sergeu [11.5K]

What’s the question, I’ll try to help you :))

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2 years ago