brandonw998
  • brandonw998
Help with Log Properties
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
brandonw998
  • brandonw998
1 Attachment
0487308
  • 0487308
First, try to solve for a, and tell me what you get. If you need help, just ask.
brandonw998
  • brandonw998
How do I set it up? I am totally confused on this one

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More answers

0487308
  • 0487308
Make a logarithmic graph with y-intercept 1.
0487308
  • 0487308
The equation for the graph is y = 3^x.
brandonw998
  • brandonw998
Alright I just input it in my calculator
0487308
  • 0487308
Now look at where y is about 0.5. What do you have?
brandonw998
  • brandonw998
The y-intercept?
0487308
  • 0487308
Ignore what I said at first lol. a is about -0.631. Now solve the logarithms, substituting that for a.
0487308
  • 0487308
Because \[\log_{a}3 \approx 0.5, 3^{a} =0.5,\] which is why we made that graph.
brandonw998
  • brandonw998
When I input it in it says ERROR NONREAL ANSWERS
0487308
  • 0487308
Sorry, I was solving it as an antilog. Really, \[a \approx 9\] because \[a ^{0.5} = 3\], so plug a as 9 into your calculator. Again, sorry :P
0487308
  • 0487308
Remember to round your answers to the nearest 10th
brandonw998
  • brandonw998
So the first one is .82?
0487308
  • 0487308
Yes.
0487308
  • 0487308
I meant round to the nearest 100th, sorry
0487308
  • 0487308
So do you get it now?
brandonw998
  • brandonw998
One sec almost done
brandonw998
  • brandonw998
I think I put the wrong amount of decimal places
brandonw998
  • brandonw998
Because the only one I got correct was the last one lol
0487308
  • 0487308
lol
0487308
  • 0487308
How do you know if you got something right or wrong?
brandonw998
  • brandonw998
For some reason I got Part C wrong but the rest were right
brandonw998
  • brandonw998
I have three chances to get the question correct, if I get it correct it turns green
brandonw998
  • brandonw998
For Part C I got .95
brandonw998
  • brandonw998
I don't understand why it's wrong
0487308
  • 0487308
I'm pretty sure that that's right, because \[\log_{9} 8 = 0.94639463036\approx 0.95 \]
brandonw998
  • brandonw998
Ugh it says the answer was .96 :(
brandonw998
  • brandonw998
So I got all of them right except Part C
brandonw998
  • brandonw998
Thanks for helping I really appreciate it
brandonw998
  • brandonw998
Can you help with another one?
0487308
  • 0487308
That's weird, you should talk to your teacher about that, and maybe he can correct or further explain...
brandonw998
  • brandonw998
Do you know how to do this?
1 Attachment
0487308
  • 0487308
I'll try… I'm only in Algebra II...
brandonw998
  • brandonw998
I couldn't even figure it out on Mathway, I thought you simply plug in the numbers but it doesn't work. Almost all the answers are regular numbers like 23, 8, etc.
brandonw998
  • brandonw998
On my previous tries that's how I know what the answers will be like
0487308
  • 0487308
For a, I got about 3.1543373037306295775285947507683823509222940831872816
0487308
  • 0487308
I don't know what you have to round to, is it two digits again?
0487308
  • 0487308
It's probably 3.15
brandonw998
  • brandonw998
Some were whole numbers
0487308
  • 0487308
Do you mean the actual answer, or the parts (like a^-4)
brandonw998
  • brandonw998
The actual answer
brandonw998
  • brandonw998
The answers are a)=10 b)=6
0487308
  • 0487308
I haven't done all of them yet, but a isn't.
brandonw998
  • brandonw998
c)=-0.20833333333333
0487308
  • 0487308
I'll do c and see what I get.
brandonw998
  • brandonw998
I went ahead and jumped to the answer to see if you were doing it correctly
0487308
  • 0487308
Can you wait a sec, I need to finish my homework. I'll be back in about 5 minutes.
brandonw998
  • brandonw998
Oh okay no problem
brandonw998
  • brandonw998
I'm going to go eat, so take your time
0487308
  • 0487308
okay
0487308
  • 0487308
I'm back. I think that I did a wrong, so I'm doing it again right now.
0487308
  • 0487308
I did a again, and I got 12.920558458320164071748303635625470295773499596979904
0487308
  • 0487308
Rounded, that is obviously 12.92
brandonw998
  • brandonw998
I'm back, sorry for taking so long
brandonw998
  • brandonw998
Thanks for all your help man I really appreciate it!
0487308
  • 0487308
No problem!

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