Please Help!!!!
Remo needs to buy a countertop for a bathroom. He calculated the area as 10 square feet. The actual area is 9.5 square feet. What is Remo's percentage error?
A) 0.5%
B) 0.95%
C) 5%
D) 5.26%

- anonymous

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- ShadowLegendX

What do you think the answer is?

- anonymous

i think its 0.5%??

- anonymous

@ShadowLegendX

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- anonymous

because if i add 0.5 + 9.5 its 10?

- ShadowLegendX

hmm

- anonymous

when the real calculation is just 9.5??

- anonymous

@ShadowLegendX

- anonymous

@ganeshie8 can you please help?

- anonymous

or somebody?? Please :(

- anonymous

C

- anonymous

0.5/10 x100 = 5

- LanHikari22

The way you calculate Error percentage is you see how "far" the faulty value, in a sense, is from the truth.
Error Percentage = | Wrong - True | / True
where Wrong = the wrong value, True = the true value, and it's absolute because we're considering a displacement. "how far" the answers are, and then the rate of that distance to our truth is the error percentage.

- ninjaslice

PLEASE DO NOT GIVE OUT THE ANSWER WITHOUT SHOWING WHY. IT IS AGAINST the terms of use guys. sadly, Just like I was, you will get suspended :/

- anonymous

???
im confused because it says the real calculation is 9.5

- anonymous

but i added 9.5 + 0.5 = 10 and 10 is what he put

- ninjaslice

have you read the lesson yet?

- anonymous

yes @ninjaslice

- ninjaslice

What does the lesson say?

- anonymous

it says that He calculated the area as 10 square feet. but the actual area is 9.5 square feet. What is Remo's percentage error? its that its 0.5 more

- anonymous

more like he put 0.5 more?

- anonymous

giving him 10 when it supposed to be 9.5

- anonymous

@ninjaslice

- ninjaslice

I sent a private message.

- anonymous

How much did he miss it by?

- anonymous

he missed it by 0.5 @nelsonjedi

- mathmate

As @LanHikari22 stated:
Error Percentage = | Wrong - True | / \(\color{red}{True}\)
= error/\(\color{red}{True}\)
So what is error, and what is "true"? @KayleeMullins

- anonymous

He calculated the area as 10 square feet. "The actual area is 9.5 square feet".

- mathmate

What is error, and what is "true"?
Once you get these right, you can work out the error percentage.

- anonymous

wait @mathmate

- anonymous

i subtracted 0.5 from 10 giving me 9.5 the real deal is 9.5 so he messed up with just 0.5

- anonymous

square feet

- mathmate

What is error, and what is "true"?

- anonymous

the error is 10 the true is 9.5

- mathmate

Hint: Error is what he thinks it is minus what it really is.

- anonymous

so 10-0.5=9.5

- ninjaslice

Nice good job!

- mathmate

true=9.5 is correct.
Take an example.
Suppose I am guessing your math grade.
I guessed 95%, and you actually got 98%.
What is true, and what is my error?

- anonymous

your error is 95% but the truth is 98% you missed by just 3% @ninjaslice

- anonymous

@mathmate

- mathmate

My guess is 95%, error is how much I am off, so 95%-98% = 3% is what I am off, or the error. Is that ok?

- anonymous

im confused?

- anonymous

im sorry

- mathmate

* -3%
and error percentage is error/actual=-3%/98%=3%

- anonymous

ohhhh okay! got what you mean! :)

- mathmate

@KayleeMullins
So is that clear to you what is error, and what is actual value ("true")?

- anonymous

Yes :)

- mathmate

Let's get back to the question.
What is error, and what is the true value?

- anonymous

the error is 10 square and the true value is 9.5?

- anonymous

0.5

- anonymous

But i do understand what you trying to say @mathmate :)

- mathmate

and the true value?

- mathmate

Well, perhaps you're busy, or perhaps you got the answer one way or another. It doesn't look like you need my help any more.
Good luck!

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