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a. 10 over 9
b. 20 over 3
c. 100 over 9
d. 700 over 3

Ok. So first you simplify whats inside the brackets

So, 70 over 21 for the first one?

Yes! And the second one..

When you have anything to the power of zero the answer is 1

(just in case you didnt know)

Yeah, I know that the top becomes 1 but I'm not sure what to do with the negative exponent.

are you allowed to use a calculator? Because then its easy

Nvm found it out, 0.125.

Ok, perfect! So now all the brackets are gone you can start applying the exponents that were outside

Right now we are still keeping the terms seperated

So what would the next step be? Do I do 70^2?

no you multiply the whole fraction by itself for 70/21

since its to the power of 2

So 70/21 times 70/21

Oh okay. I got 11.1111.. when putting it in a calculator

right. this is the same as the fraction 11 1/9 by the way.

So now you do the same with the next one

Only of course, to the power of 3 this time

512

yes!

Then the last ones fairly simple. just simplify

Yeah, 0.001953125

so now you just multiply. Again a calculator makes this quick if you are allowed one

I got 11 over 9

11 over 9?

when I do it I get 11 and 1 over 9

Can you explain what you did to get your answer?

I just put 11 and 1 over 9 * 512 * 1 over 512 into the calculator and that's what it gave me

try making 11 and 1 over 9 into an improper fraction

this time it just came out as 100 over 9

Right! Isn't that one of the answers?

Oh yeah! Thank you

You are welcome!