- anonymous

I need help this is sooo hard
8th grade math!

- chestercat

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- anonymous

it is hard, isn't it?

- anonymous

aalright haha im sure if you tae it in steps everything willl be simplar

- anonymous

What is the value of the expression \[ \frac{ 1 }{ 4^{-3}}\]

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## More answers

- anonymous

alright easy lets start by looking at the problem

- anonymous

a.12
b.64
c. 1/64
d. 1/12

- anonymous

we have a 4^-3 in the denominator. what does that tell you?

- anonymous

Its either a or b

- anonymous

umm idk

- anonymous

lets not worry about the answer right now lets worry about the problem itself

- anonymous

alright i will let you know a nice rule. when you bring a number from the denominator to the numerator you slip the exponent

- anonymous

so something like 1/5^-2 = 5^2

- anonymous

do you understand?

- anonymous

no

- anonymous

ok thats fine. its just a rule. i just want to make sure you know 5^2 is 5 squared

- anonymous

do you understand that?

- anonymous

yes

- anonymous

alright cool

- anonymous

so with your problem we have 1/4^-3

- anonymous

we bring the 4^-3 to the numerator

- anonymous

and we get?....what?

- anonymous

umm

- anonymous

...

- anonymous

ok with our rule we change the sign of the exponent

- anonymous

so what is it?

- anonymous

4* -3 ???????

- anonymous

oh i see what you are confused about. when i am talking about sign i mean positive or negative

- anonymous

so all i mean by change the sign of the exponent is change it from -3 to 3

- anonymous

so you have just 4^3

- anonymous

now what is 4 to the power of 3?

- anonymous

Its 64!

- anonymous

tysm for helping me!

- anonymous

you are welcome please look over notes on this

- anonymous

its essential on later math problems you will have i highschool

- anonymous

SO happy!

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- anonymous

im in the us

- anonymous

well i mean like algebra and pre calc it makes things easier if you know basic stuff like this

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