Here's the question you clicked on:
fruitbat
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What are you trying to solve for? There is no equation written. Are you just trying to expand it?
\[\frac{ 4r^2(2t-3)^3 }{25 }\]
Ok. Try distributing the exponent across each factor inside the parentheses. So you will have \[2^{3} * (t^{-3})^{3} * (0.4)^{2}r^{2}\]
What you have written is correct. Next you should write out what 2^3 is and what 0.4^2 is. And do you know how to handle a negative exponent ?
Yes, that will do it :) What do you get as a final answer?
Ha, np. Best of luck with your studies