Posted by Brady on .
1. The optimal height h of the letters of a message printed on pavement is given by the formula . Here, h= (0.00252d^(9/4))/e d is the distance of the driver from the letters and e is the height of the driverâ€™s eye above the pavement. All of the distances are in meters. Explain how to find h when d = 90 m and e = 1.4 m.
2.Simplify.
(27a^(6) )^(2/3)
For 2 I got 1/(9a^4 )as my answer, but can someone again please check this.
For 1 I really do not know, I have been trying to figure out for a while.
Please check and help me for 1, and please help with 2. 1 is from another thing, but no one has answered it.
I will appreciate the help. Also, please try to answer these two as soon as possible.

More Rational Exponents!  Correction for Mistake 
Brady,
I did mean to put "For 1 I really do not know, I have been trying to figure it out for a while." instead of what I put. Just saying this, so no one will get confused at that point.

More Rational Exponents!  Is Anyone there? Ms. Sue? Damon? Steve? Reiny? 
Brady,
Is anyone there? I'm still here, and will be until it gets answered. I will still appreciate it if you guys can answer these.

More Rational Exponents!  Possible Answer for 1. 
Brady,
For 1, I think the answer is this:
First, you replace the variables with 90 and 1.4 to get this equation: (0.00252∙〖90〗^(9/4))/1.4. Next, you turn the 〖90〗^(9/4)into ∜(〖90〗^9 ). Then, I turn ∜(〖90〗^9 )into 3∜(〖10〗^9 ), and simplify 3∜(〖10〗^9 )to 9∜10. Next, I divide o.oo252 by 1.4 to get 0.0018. Then, my next equation is: 0.0018∙9∜10. Finally, I multiply 0.0018 and 9 together to get 0.0162, and my final answer is 0.0162∜10
Is my answer correct? Please check it to make sure that it is correct or not? Also, if it is incorrect, please help me correct my mistakes. I will appreciate it if any of you guys do. 
More Rational Exponents!  Please Help!!!!!!!!! 
Brady,
If anyone can answer or help me for these two problems, please do. I will appreciate it even more if you can answer and/or check the problems as soon as possible. I have been waiting and trying to answer it for a long time. My mom wants me to get my lesson done on this topic today, and I am stuck at this point, which is really close to the end. Also, thank you if anyone can help or answer these two problems.