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Tutors Answer Your Questions about Exponents (FREE)
Question 202539: I have to quick questions on exponents
I basically have to simplify them
1. [(9a^3)/(10b^4)]^-2
I came up with:
(9^-2*a^3*-2)/(10^-2b^4*-2)
(81a^6)/(100b^8)
Is that simplified or is there more to do?
2.(6x^5y^2z^-4)(4x^-2y^4z^-1)
I got= 6x^5y^2z^-4/4x^-2y^4z^-1
Am I suppose to flip the equation to get rid of the negative exponents are do I just add them together they way they are?
(u^5z^8)/(z^-5u^-4)
In this one too I flip the equation to: Z^5u^4/u^5z^8 and i got u^9z^13
Was I suppose to flip it?
Click here to see answer by Earlsdon(4900)   |
Question 202817: To whomever decides to help me.
I have been working on this problem ALL DAY LONG! Here it is:
((x+2)*(1/2)(x+1)^(-1/2)-(x+1)^(1/2))/(x+2)^(2).
I have gotten several different answers. I am unsure of what I am doing wrong. At first I tried bringing down the negative exponent and then canceling out, I got (-1/2)/(x+2)but I don't think that it is correct. All the other sulutions are a bunch of mumble jumbles. I thought maybe I should convert into rational terms but I ended with an imaginary number (SQRT of 1/2) in the domnimator but I don't think that is correct at all.
Any help at all would be greatly appreciated.
Thanks you soooooo muchs!
Maggie
Click here to see answer by jim_thompson5910(13794) |
Question 203189: To express 20 as a sum of different powers of 2, we would write 20 = 24 + 22. The sum of the exponents of these powers is 4 + 2 = 6. If 400 were expressed as a sum of at least two distinct powers of 2, what would be the least possible sum of
the exponents of these powers?
Click here to see answer by jsmallt9(594) |
Question 204458: Time (h) 0, 8, 16, 24, 32, 40, 48
Amount (g) 4.84, 4.63, 4.52, 4.45, 4.33, 4.19, 4.08
(a) Find an appropriate exponential model of the data points.
Amount at time t, A(t) =
I know I have to make two equations y=Ca^x
would someone be able to explain the steps please?
Click here to see answer by stanbon(26283) |
Question 205003: Can anyone help me with this world problem. Your help is greatly appreciated.
8. A woman buys three board games for $107.10, including tax. If each board game cost $34, what was the sales tax rate?
Click here to see answer by rfer(2688) |
Question 205004: I need help with this word problem. Can anyone help me? I do appreciate whatever you can do.
9. Sandy has $3.25 in change. She has five more dimes than quarters but twice as many nickels as dimes. Express the given information as an algebraic equation and simplify. [You are not required to solve the problem.
Click here to see answer by ankor@dixie-net.com(6693)  |
Question 205004: I need help with this word problem. Can anyone help me? I do appreciate whatever you can do.
9. Sandy has $3.25 in change. She has five more dimes than quarters but twice as many nickels as dimes. Express the given information as an algebraic equation and simplify. [You are not required to solve the problem.
Click here to see answer by scott8148(3382)  |
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