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3 years ago

10

HELPPPPPP MEEEEE!!!!!!

1 answer:

Kazeer [188]3 years ago

3 0

Answer:

It's a

Step-by-step explanation:

The speed goes up, and so does the time

then the speed stays the same but the time keeps going

then the time keeps going and the speed goes down

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The approximate value of 4 times 10 Superscript 9 divided by left parenthesis 1.5 times 10 Superscript 6 right parenthesis is

sashaice [31]

Simplify the expression. Write the answer in scientific notation. left parenthesis 9 times 10 Superscript negative 4 right parenthesis left parenthesis 6 times 10 Superscript negative 5 right parenthesis(9×10−4)(6×10−5)

3 0

4 years ago

A machine that produces a major part for an airplane engine is monitored closely. In the past, 10% of the parts produced would b

nata0808 [166]

Answer:

With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is of at least 216.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

For this problem, we have that:

$p = 0.1$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is

We need a sample size of at least n, in which n is found M = 0.04.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.04 = 1.96\sqrt{\frac{0.1*0.9}{n}}$

$0.04\sqrt{n} = 0.588$

$\sqrt{n} = \frac{0.588}{0.04}$

$\sqrt{n} = 14.7$

$(\sqrt{n})^{2} = (14.7)^{2}$

$n = 216$

With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is of at least 216.

7 0

4 years ago

mark used a graph to compare the wages from two restaurans jobs.a dishwasher earns $7.25 per hour,while a waiter earns $3.75 per

Alla [95]

Y=14.50

Y=12

hope this helps.

4 0

4 years ago

What is an angle that is complementary to 5?

Elis [28]

angle 4 is complementary

4 0

4 years ago

Solve x and give our answer as a improper fraction in its simplest form:

Diano4ka-milaya [45]

Hello!

Explanation:

Distributive property: → a(b+c)=ab+ac

Expand.

$6(x-9)=6x-54$

$6x-54=3x+2$

First, add by 54 from both sides of an equation.

$6x-54+54=3x+2+54$

Then, simplify by equation.

$6x=3x+56$

You can also subtract by 3x from both sides of an equation.

$6x-3x=3x+56-3x$

Simplify.

$3x=56$

Next, divide by 3 from both sides of an equation.

$\frac{3x}{3}=\frac{56}{3}$

Answer: → $\boxed{x=56/3}$ and $x=18.6=19.0$

Hope this helps!

Have a great day!

-Charlie

7 0

4 years ago