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3 years ago

14

Need help plz thank you

1 answer:

Vika [28.1K]3 years ago

3 0

Its B don't thx me

I hope I help

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Ryan wrote a number on his paper. His number rounds to 350 when rounded to the nearest ten. His number rounds to 300 when rounde

agasfer [191]

Answer

342 is one

Step-by-step explanation:

3 0

3 years ago

If 14 out of 24 students in a college class are men,then,to the nearest tenth of a percent,what percent of the classics composed

baherus [9]

0.583 is the correct answer

4 0

3 years ago

Read 2 more answers

How do you get the answer for 820 decreased by 25%

pentagon [3]

So in this one, we are DECREASING by 25%, so we say 25% of 820...

25% × 820 =
.25 × 820 = 205

Now since we are decreasing by 25%, we take our answer and subtract it from the original amount, 820.

820 - 205 = 615

820 decreased by 25% is
615.

7 0

3 years ago

Please help, Describe the transformation of the graph of the parent function y = √x for the function y = √x + 7 + 5.

Setler79 [48]

Answer:

C. Up.

Step-by-step explanation:

We have been given that the parent function $y=\sqrt{x}$ is transformed to the function $y=\sqrt{x+7}+5$ . We are asked to describe the given transformation.

Let us recall the transformation rules.

$f(x+a)=\text{Graph shifted to left by a units}$ ,

$f(x-a)=\text{Graph shifted to right by a units}$ ,

$f(x)+a=\text{Graph shifted upwards by a units}$ ,

$f(x)-a=\text{Graph shifted downwards by a units}$ .

Upon comparing our transformed function with the parent function, we can see that the graph is shifted to left by 7 units and upwards by 5 units.

Therefore the correct choice is option C.

5 0

3 years ago

Read 2 more answers

A study claims that college students spend an average of 4 hours or less studying per day. A researcher wants to check if this c

kirill115 [55]

<h2>Answer with explanation:</h2>

Let $\mu$ be the population mean.

By observing the given information, we have :-

$H_0:\mu\leq4\\\\H_a:\mu>4$

Since the alternative hypotheses is left tailed so the test is a right-tailed test.

We assume that the time spend by students per day is normally distributed.

Given : Sample size : n=121 , since n>30 so we use z-test.

Sample mean : $\overline{x}=3.15$

Standard deviation : $\sigma=1.2$

Test statistic for population mean :-

$z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

$\Rightarrow\ z=\dfrac{3.15-4}{\dfrac{1.2}{\sqrt{121}}}\\\\\Rightarrow\ z=-7.79166666667\approx-7.79$

Critical value (one-tailed) corresponds to the given significance level :-

$z_{\alpha}=z_{0.1}=1.2816$

Since the observed value of z (-7.79) is less than the critical value (1.2816) , so we do not reject the null hypothesis.

Hence, we conclude that we have enough evidence to accept that the college students spend an average of 4 hours or less studying per day.

4 0

3 years ago