Trouble with a math problem

[rinsterman12]

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The problem is (.01)^2 [(.16)^1.2 +4.5)/.003
What I do is convert everything into a fraction and I get 163, but the answer is .16. Help I have no clue what I am doing wrong.

 

[prsndwg]

The problem is (.01)^2 [(.16)^1.2 +4.5)/.003
What I do is convert everything into a fraction and I get 163, but the answer is .16. Help I have no clue what I am doing wrong.

you got it.. just convert it back into fraction again.

 

[rinsterman12]

When I look at this answer I see something that should be larger than what I am getting. Could you show me the algebra? Just the part converting it back into a decimal and the rational behind that. I am terrible at math as you can see.

 

[redchesus]

Your parentheses aren't matching, I'm having a hard time deciphering what the problem is

and tell how you calculated 1.2 power, because even when you convert it to a fraction 6/5 = 6 * (1/5), I can't calculate the 5th root of something off the top of my head

 

[rinsterman12]

(.01)^2 (.16)^1.2 +4.5) /.003 This is the problem. The answer to the problem is 163, but the DAT online test says the answer is .163. I just want to know why you divide the final answer by 1000 to yield 0.163.

 

[UCB05]

again, your parentheses aren't matching. You have 2 open, 3 closed parentheses, so until you give us the right format, we can't even begin to figure out your question 😀

 

[Sed8&Intub8]

What you might be doing wrong is when squaring the .1 you might not be getting .0001. That might throw you off.

[((.1)^2)((.16^1.2)+4.5)]/(.003)

So, (.1)^2 = .0001
(.16^1.2) + 4.5 ~ .11 + 4.5 = 4.61
.0001 * 4.61 = 0.000461
.000461/.003 ~ .16

I don't know how the DAT works, but for the MCAT I just rounded and approximated all the numbers since we can not use a calculator.

 

[EyEnStein 07]

What you might be doing wrong is when squaring the .1 you might not be getting .0001. That might throw you off.

[((.1)^2)((.16^1.2)+4.5)]/(.003)

So, (.1)^2 = .0001
(.16^1.2) + 4.5 ~ .11 + 4.5 = 4.61
.0001 * 4.61 = 0.000461
.000461/.003 ~ .16

I don't know how the DAT works, but for the MCAT I just rounded and approximated all the numbers since we can not use a calculator.

Im not sure what your talking about here...squaring .1 doesnt give you .0001, it gives you .01

also it could be that the answer is wrong, have you used a regular calculator just to make sure? Try that. anyways from the looks of it....the number looks to be big according to the problem. Your going to get a numerator thats less than 5, and the denominator will be .003...

if you divide 5 by .003 your going to get a number thats like 1500+ (since your dividing essentially 5000/3)

 

[Sed8&Intub8]

sorry i meant squaring .01 from the original question. That gives you 0.0001.

Now that problem will work, I just copied it wrong.

 

[Sed8&Intub8]

[((.01)^2)((.16^1.2)+4.5)]/(.003)

So, (.01)^2 = .0001
(.16^1.2) + 4.5 ~ .11 + 4.5 = 4.61
.0001 * 4.61 = 0.000461
.000461/.003 ~ .16


Like that above, my apologies.

 

[prsndwg]

[((.01)^2)((.16^1.2)+4.5)]/(.003)

So, (.01)^2 = .0001
(.16^1.2) + 4.5 ~ .11 + 4.5 = 4.61
.0001 * 4.61 = 0.000461
.000461/.003 ~ .16


Like that above, my apologies.

how did you calc this with hand?

 

[Sed8&Intub8]

I knew that:

.16^1 = .16
.16^1.5 = .064
.16^2 = .0256

So, .16^1.2 = something between .16 and .064, so I picked something in between which happens to be .11. I just estimated that number, not sure what the exact number is, but I think it is close enough. I guess I could have also picked .12 or .10, it should not have had too much of a difference.