Help figure out the fraction?

Question

anonymous · Answer

attachment

hero · Answer

Hint x = 5

anonymous · Answer

I know that.. But it comes out to be a number and idk how to turn it into a fraction.

anonymous · Answer

@whpalmer4

hero · Answer

You are given 

$F(x) = \dfrac{3^x}{7}$

and $x = 5$ 

So 

$F(5) = \dfrac{3^5}{7}$

And then you simplify that. Keep in mind that
$3^5 = (3)(3)(3)(3)(3)$

hero · Answer

Also, it says to enter as a fraction IF NECESSARY

hero · Answer

Which means, if your result is not a fraction, then it is not necessary to enter your result as a fraction.

anonymous · Answer

it was 1/7 multiplied by 3^x ... So does that turn into 3^x/7?

hero · Answer

ya

anonymous · Answer

243/7

hero · Answer

$\dfrac{1}{2}x = \dfrac{x}{2}$

anonymous · Answer

which is 34.71

hero · Answer

Enter it as a fraction

anonymous · Answer

243/7?

hero · Answer

ya

anonymous · Answer

I'm confused on this one as well.

hero · Answer

x = 4

anonymous · Answer

I know... But how would I do that 1/7^4?

whpalmer4 · Answer

find $7^4 = 7*7*7*7=$

then divide 1 by that number, and multiply by 35

hero · Answer

You don't have to divide anything by 1. I don't know why @whpalmer4 told you to do that.

whpalmer4 · Answer

Work on your reading comprehension.  I said divide 1 by that number.

hero · Answer

You don't have to do that either. I know what you said.

whpalmer4 · Answer

so why are you saying I told her to do something that I didn't in fact tell her to do?

hero · Answer

Why are you telling her to do something she doesn't have to do?

whpalmer4 · Answer

I quote: "how would I do that 1/7^4?"

hero · Answer

I see. You haven't read her actual question yet.

whpalmer4 · Answer

I just quoted the relevant part.  She asked how to compute 1/7^4.  I told her that, and then told her the following step to complete the problem.  Now, do you want to continue setting a fine example here?

hero · Answer

The user is no longer here. I think I know why, but I'll help her when she comes back. If she comes back.

anonymous · Answer

I'm back on... I had to help my nephew.

hero · Answer

Did you figure out the correct answer to the second question you posted?

anonymous · Answer

So the answer is 84,035

hero · Answer

At some point you arrived at
$$F(x) = 35\dot\ \frac{1}{7^4}$$

How did you get from that to 84,035?

anonymous · Answer

Ohh... I thought I was supposed to just multiply 7^4 (2401) by 35...

hero · Answer

No, because $\frac{1}{7^4}$ is a fraction.

hero · Answer

You have to multiply it to get $\dfrac{35}{7^4}$

anonymous · Answer

So..... multiply the numerator and the denominator by 35?