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3 years ago

Please could someone help the problem is on the picture. ( Idk if this is right but I think the answer is 50%?

Mathematics

1 answer:

never [62]3 years ago

3 0

Answer:

20%

Step-by-step explanation:

If he lowers it by 20% to get the sale price then he must raise it 20% to get the retail price

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Which value would not be part of the domain of the inverse of the given relation?

Sidana [21]

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3 years ago

You want to test your newly created Web site, so you have 250 people access it from random locations at random times. Of the peo

Arte-miy333 [17]

Answer: 505

Step-by-step explanation:

The formula to find the sample size n , if the prior estimate of the population proportion (p) is known:

$n= p(1-p)(\dfrac{z}{E})^2$ , where E= margin of error and z = Critical z-value.

Let p be the population proportion of crashes.

Prior sample size = 250

No. of people experience computer crashes = 75

Prior proportion of crashes $p=\dfrac{75}{250}=0.3$

E= 0.04

From z-table , the z-value corresponding to 95% confidence interval = z=1.96

Required sample size will be :

$n=0.3(1-0.3)(\dfrac{1.96}{0.04})^2$ (Substitute all the values in the above formula)

$n= (0.21)(49)^2= 0.21\times2401$

$n= 504.21\approx505$ (Rounded to the next integer.)

∴ Required sample size = 505

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3 years ago

Calculate the perimeter of this shape.

Sloan [31]

Step-by-step explanation:

Hello there!

Just double the given sides!

(18*2)+(12*2)=60 cm.

There you are!

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3 years ago

8/9 + 2/3 + 1/6 = PLeASe HeLp A. 11/8 B. 11/15 C. 1 13/18 D. 1 2/9

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Answer:

C. 1 13/18

Explanation:

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3 years ago

(x^2+3x+1)(x^2-2x+5)

deff fn [24]

Answer:

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Step-by-step explanation:

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