Tutors Answer Your Questions about Exponents (FREE)
Question 490262: I don't even understand this let alone know how to answer it, could someone please explain? it would be really appreciated.
The following is an exponential relationship between unemployment rate, U, and inflation rate, I depicted by the function
I = 24e^(-0.3U)
a. Sketch a graph of this function, for domain 0 ≤ U ≤ 10
b. Rearrange the formula for the above function to make U the subject.
Click here to see answer by ankor@dixie-net.com(22740)   |
Question 490863: Not sure what topic this would be, but...
I have this math book 'Math to the Max 1200 questions!' So far I have encountered a couple problems with answers.
Simplify the following expression.
4x^-2(3ax)^5
The simplified answer I came up with is: 972a^5x^3
The simplified answer in the book is: 108a^3x
This doesn't make any sense to me. I have also checked using a few online expression calculators/simplify that came up with the same answer I have. 972a^5x^3 What is the correct answer? :( He explains the method he used to get the answer, but it doesn't make sense and he never explained it before the exercise questions.
One more :)
Simplify the following expression.
(3x)^3 / x^2*x^4 (online calcs need the last bit in parentheses, so, (x^2*x^4)
The simplified answer I came up with (and online calculators): 27/x^3
The simplified answer the author came up with: 27x/3
It doesn't make any sense... :( Unless the author is incorrect. Haha, I can hope. :D
Thanks for your time. :)
Click here to see answer by mananth(16946)  |
Question 494592: An aquarium has a square base with a side length of 15 inches. You fill the aquarium with water to a height of 15 inches.
a. Find the volume of the water in the aquarium.
b. A cubic inch of water weighs approximately 0.036 pound. Find the approximate weight of the water in the aquarium.
Click here to see answer by solver91311(24713)  |
Question 494627: I am having a hard time with multiplying out (2+h)^3. I have tried to do
(2+h)(2+h)(2+h) and did (2^2+2h+h^2)= (4+2h+h^2) . I am using this in Derivatives.
So If f(x)=x^3 I have to find the tangent line of the equation through point (2,8).
So F'(2+h)= ((2+h))^3 Which is (4+2h+h^2)
Then F'(2)= (2)^3 Which is (8)
So then I take (4+2h+h^2)-(8)
and I get -4+2h+h^2/h Do you see my problem.
I have tried this so many different ways. Where am I making my error?
Click here to see answer by richard1234(7193)  |
Question 494627: I am having a hard time with multiplying out (2+h)^3. I have tried to do
(2+h)(2+h)(2+h) and did (2^2+2h+h^2)= (4+2h+h^2) . I am using this in Derivatives.
So If f(x)=x^3 I have to find the tangent line of the equation through point (2,8).
So F'(2+h)= ((2+h))^3 Which is (4+2h+h^2)
Then F'(2)= (2)^3 Which is (8)
So then I take (4+2h+h^2)-(8)
and I get -4+2h+h^2/h Do you see my problem.
I have tried this so many different ways. Where am I making my error?
Click here to see answer by MathLover1(20849)  |
Question 501214: Hi, my question is about order of operations. I have tried this question so many times but never got the right answer:
4[2(-5x+y)-y]-10(y-4x)
Can you help me? *if possible, can you give me step by step?*
Thank you!
Click here to see answer by nerdybill(7384)  |
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