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3 years ago

Will give brainliest

Mathematics

2 answers:

sweet [91]3 years ago

6 0

Answer:

Step-by-step explanation:

I did this test and got this one correct.

nalin [4]3 years ago

5 0

Answer:

give me brainliest first

Step-by-step explanation:

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If p(a) = 0.25 and p(b) = 0.65, assuming independence of events, then p(a and<br> b.is:

Art [367]

0.25x0.65=0.1625
full answer

8 0

3 years ago

Javier has a model of a cone with a radius of 3 inches and a height of 10 inches. Javier increased his model’s volume by doublin

statuscvo [17]

Answer:

$240 \pi\ in^{3}$

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its volumes is equal to the scale factor elevated to the cube

Let

z------> the scale factor

x-----> the volume of the larger cone

y-----> the volume of the original cone

$z^{3}=\frac{x}{y}$

In this problem we have

$z=2$ -----> scale factor

substitute

$2^{3}=\frac{x}{y}$

$8=\frac{x}{y}$

$x=8y$

That means-----> The volume of the larger cone is 8 times the volume of the original cone

Find the volume of the original cone

$V=\frac{1}{3}\pi r^{2} h$

we have

$r=3\ in$

$h=10\ in$

substitute

$V=\frac{1}{3}\pi (3^{2})(10)=30 \pi\ in^{3}$

therefore

The volume of the larger cone is equal to

$8*30 \pi\ in^{3}=240 \pi\ in^{3}$

3 0

3 years ago

Read 2 more answers

A researcher took a random sample of 100 students from a large university. She computed a 95% confidence interval to estimate th

katen-ka-za [31]

Answer:

Part (A): The correct option is true.

Part (B): The null and alternative hypothesis should be:

$H_o: \mu =0 ; H_a:\mu \neq0$

Step-by-step explanation:

Consider the provided information.

Part (A)

A random sample of 100 students from a large university.

Increasing the sample size decreases the confidence intervals, as it increases the standard error.

If the researcher increase the sample size to 150 which is greater than 100 that will decrease the confidence intervals or the researcher could produce a narrower confidence interval.

Hence, the correct option is true.

Part (B)

The researcher wants to identify that whether there is any significant difference between the measurement of the blood pressure.

Therefore, the null and alternative hypothesis should be:

$H_o: \mu =0 ; H_a:\mu \neq0$

7 0

3 years ago

If i earn 165 dollars in 20 hours how many would i make in 40 hourr

Triss [41]

Answer:

330

Step-by-step explanation:

165 times 2 equals 312. This is because you're doubling the amount of money and hours.

7 0

3 years ago

Solve for k. J=k^2/4

Anna [14]

Answer: K = 0

Step-by-step explanation:

I'm pretty sure this is right or not.

5 0

3 years ago