This one is very similar to yesterday's question, but just with different values for t...this is yesterday's question:
http://web2.0calc.com/questions/evaluate-the-expression-4m-t-for-m-7-t-2-42-49-30-36
If you don't understand the answer, let me know what you don't understand about it.
You can do that on this site!
Go here: (the homepage)
then type in 4^8*4^9
By the way, if your multipling two numbers with the same base, you can add the exponets.
So 48*49 = 48+9 = 417