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3 years ago

NEED HELP ASAP

Mathematics

2 answers:

Archy [21]3 years ago

7 0

I think its c your welcome

natita [175]3 years ago

4 0

Hello! I just took the quiz but my answers were A and B because of the way that they were ordered, but in this problem yours is A and D! (:

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Find the volume.<br> Thank you!!!

Alex Ar [27]

Answer:

Step-by-step explanation:

7*2*8

L*W*H

7 0

3 years ago

Read 2 more answers

A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c

Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when $M = 0.06, \sigma = 1.1$

$0.06 = 2.575*\frac{1.1}{\sqrt{n}}$

$0.06\sqrt{n} = 2.575*1.1$

$\sqrt{n} = \frac{2.575*1.1}{0.06}$

$(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}$

$n = 2228.6$

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0

3 years ago

The time it takes to charge the battery of a cell phone is directly proportional to the charge of the battery.

goldenfox [79]

Answer:

4 i believe

Step-by-step explanation:

Im so sorry if this is wrong and for being late

8 0

2 years ago

Find the sum of 5(-3.4k -7) + (3k +12) and please show work

pishuonlain [190]

$5(-3.4k-7)+(3k+12)=\ \ \ \ | omiting\ brackets\\\\
-17k-35+3k+12=\\\\
-14k-23\\\\
Solution\ is\ -14k-23$

5 0

3 years ago

Can someone help me

rodikova [14]

Try this explanation:

Note, in the 1st row given '9x', in the 2d one - '9(0)', then it means the substitution '0' instead of 'x'. In other words <u>x=0</u> !

answer: x-intercept is '0', y-intercept is '12'

3 0

3 years ago