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Mathematics 8 Online
OpenStudy (anonymous):

help

OpenStudy (anonymous):

http://gyazo.com/3b0f98b2a373a5b9530d808a39cf8718

OpenStudy (igreen):

Okay, which question are you having trouble on?

OpenStudy (anonymous):

im trying to find out what is wrong and what is right

OpenStudy (igreen):

For Question #3, simplify all the fractions into decimals. \(\sf \dfrac{42}{999}, \dfrac{42}{999}, \dfrac{42}{99}, \dfrac{99}{42}\)

OpenStudy (igreen):

Plug them into your calculator..tell me what you get for each one.

OpenStudy (igreen):

We're looking for the one that looks like \(\sf 0.424242424242.~.~.\)

OpenStudy (anonymous):

42/999=0.04204204 42/999=0.04204204 42/99=

OpenStudy (igreen):

42/99 = ?

OpenStudy (anonymous):

0.424242424242

OpenStudy (igreen):

Yes, so which one is correct?

OpenStudy (anonymous):

42/99

OpenStudy (igreen):

Yes, and which option has that?

OpenStudy (anonymous):

b

OpenStudy (anonymous):

c

OpenStudy (igreen):

Yes, C is correct.

OpenStudy (anonymous):

ok im working on 4

OpenStudy (igreen):

Okay, convert all of them to decimals.

OpenStudy (igreen):

\(\sf \sqrt{64}=~\! ?\) \(\sf 8 \dfrac{1}{7} = ~ \! ?\) \(\sf 8.\overline{14} = ~ \! ?\) \(\sf \dfrac{15}{2} = ~ \! ?\)

OpenStudy (igreen):

Do the first one, tell me what you get.

OpenStudy (anonymous):

64=8 8 1/7=0.142857 8.14=0.57142857 15/2=7.5

OpenStudy (igreen):

Not quite. \(\sf 8 \dfrac{1}{7} = 8.142857.~.~.\) You got the \(\sf \dfrac{1}{7}\) part correct, but don't forget to add \(\sf 8\). Also, the overline sign means that those two numbers repeat. \(\sf 8.\overline{14} = 8.1414141414.~.~.\) So can you arrange these from least to greatest? \(\sf 8, 8.142857.~.~., 8.1414141414.~.~., 7.5\)

OpenStudy (igreen):

I gotta go soon..

OpenStudy (anonymous):

so what does that mean

OpenStudy (igreen):

Which number is the smallest out of those?

OpenStudy (anonymous):

15/2

OpenStudy (igreen):

Yes, then which one is the next smallest?

OpenStudy (anonymous):

64

OpenStudy (igreen):

Correct..then which one? So far we have: \(\sf \dfrac{15}{2}, \sqrt{64}\)

OpenStudy (igreen):

It should be \(\sf 8.\overline{14}\) 8.14141 8.14285 8.14 is the same for both, compare the next number. The first one has 1, and the second has 2, therefore the 2nd is bigger than the first. 8.14285 > 8.14141 So: \(\sf 8 \dfrac{1}{7} > 8.\overline{14}\) So our final answer is: \(\sf \dfrac{15}{2}, \sqrt{64}, 8.\overline{14}, 8 \dfrac{1}{7}\)

OpenStudy (igreen):

I have to go..bye

OpenStudy (setsuna-yuregeshi):

If you need anymore help, I'm here...

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