3 years ago

Can someone help me please im having a rough time with this question

Mathematics

1 answer:

In-s [12.5K]3 years ago

3 0

Answer:

Step-by-step explanation:

the other answers are totally absurd.

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(5 ^ 11)/(5 ^ ?) = 5 ^ 4

katrin2010 [14]

Answer:

200

Step-by-step explanation:

55 / 5x = 20

5x=1100

x=200

6 0

3 years ago

Find the minimum sample size needed to estimate the percentage of Democrats who have a sibling. Use a 0.1 margin of error, use a

Brums [2.3K]

Answer:

The minimum sample size is $n =135$

Step-by-step explanation:

From the question we are told that

The confidence interval is $( lower \ limit = \ 0.44,\ \ \ upper \ limit = \ 0.51)$

The margin of error is $E = 0.1$

Generally the sample proportion can be mathematically evaluated as

$\r p = \frac{ upper \ limit + lower \ limit }{2}$

$\r p = \frac{ 0.51 + 0.44}{2}$

$\r p = 0.475$

Given that the confidence level is 98% then the level of significance can be mathematically evaluated as

$\alpha = 100 - 98$

$\alpha = 2\%$

$\alpha =0.02$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table

The value is

$Z_{\frac{\alpha }{2} } = 2.33$

Generally the minimum sample size is evaluated as

$n =[ \frac { Z_{\frac{\alpha }{2} }}{E} ]^2 * \r p (1- \r p )$

$n =[ \frac { 2.33}{0.1} ]^2 * 0.475(1- 0.475 )$

$n =135$

6 0

3 years ago

A wise man once said "500 reduced by twice my age is 394." what is his age?

stich3 [128]

X=the man's age
500-2x=394
-500 -500
-2x=-106
-2x/2=-106/-2
x=53

FINAL ANSWER: 53 years old

Hope this helps! :)

5 0

3 years ago

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A liquid is found to have a volume of 50 mL (in a graduated cylinder). When placed on a balance, the liquid and graduated cylind

Lena [83]

1g/ml

Mark brainliest please

Hope this helps you

8 0

2 years ago

<img src="https://tex.z-dn.net/?f=%28%5Cfrac%7B3%7D%7B2%7D%20-%5Cfrac%7B1%7D%7B1%7D%20%29-%285%2B%5Cfrac%7B1%7D%7B1%7D%20%29%3D"

Andrew [12]

Your answer would be -11/2 and a alternate form would be -5 1/2 or -5.5

7 0

3 years ago

Read 2 more answers