All categories

2 years ago

Solving distance problems- 10 points

Mathematics

1 answer:

slega [8]2 years ago

5 0

Answer:

1. 54 and 9/20 km

2. 80 mm

3. 1.142 mi

4.0.83333 cm

Step-by-step explanation:

Do them all by the butterfly method.

You might be interested in

2. Tonya runs 8 kilometers in 60 minutes. At this rate.

egoroff_w [7]

Answer:

Step-by-step explanation:

8:60 is the rate

Divided by 2

4:30

So, she could run 4 kilometers in 30 minuets.

Divide by 2 again.

2:15

She can run 2 kilometers in 15 minuets.

7 0

2 years ago

A 99% confidence interval for the mean μ of a population is computed from a random sample and found to be 6 ± 3. We may conclude

valentina_108 [34]

Answer:

A. there is a 99% probability that μ is between 3 and 9.

Step-by-step explanation:

From a random sample, we build a confidence interval, with a confidence level of x%.

The interpretation is that we are x% sure that the interval contains the true mean of the population.

In this problem:

99% confidence interval.

6 ± 3.

So between 6-3 = 3 and 6 + 3 = 9.

So we are 99% sure that the true population mean is between 3 and 9.

So the correct answer is:

A. there is a 99% probability that μ is between 3 and 9.

4 0

3 years ago

Read 2 more answers

A student scores 50 and 100 on two tests in class. What is his average?

9966 [12]

75% you add them together then devide by 2

6 0

3 years ago

Read 2 more answers

Please help ASAP!

Kruka [31]

First, recall that

$\sin(-\theta)=-\sin\theta$

So if $\sin(-\theta)=\dfrac15$ , then $\sin\theta=-\dfrac15$ .

Second,

$\tan\theta=\dfrac{\sin\theta}{\cos\theta}$

We know that $\tan\theta>0$ and $\sin\theta$ , which means we should also have $\cos\theta$ .

Third,

$\sin^2\theta+\cos^2\theta=1\implies\cos\theta=\pm\sqrt{1-\sin^2\theta}$

but as we've already shown, we need to have $\cos\theta$ , so we pick the negative root.

Finally,

$\tan\theta=\dfrac{\sin\theta}{\cos\theta}\iff\dfrac6{\sqrt{12}}=\dfrac{-\frac15}{\cos\theta}\implies\cos\theta=-\dfrac1{5\sqrt3}$

Unfortunately, none of the given answers match, so perhaps I've misunderstood one of the given conditions... In any case, this answer should tell you everything you need to know to find the right solution from the given options.

6 0

3 years ago

48 divided by 9853 is what

Vinil7 [7]

Answer:

0.0049

Step-by-step explanation:

4 0

2 years ago