Posted by Melanie on Monday, March 28, 2011 at 5:14pm.
Which expression represents the larger number?
A. 40.1 x 10 to the 6 power
B. 4.1 x 10 to the 7 power
C. 0.411 x 10 to the 6 power
D. 0.04001 x 10 to the 5 power
I got A, but I'm not quite sure if it's the right answer :/

Math  Reiny, Monday, March 28, 2011 at 5:37pm
A  40.1 x 10^6 = 4.01 x 10^5
B  4.1 x 10^7
C  .411 x 10^6 = 4.11 x 10^7
D .04001 x 10^5 = 4.001 x 10^7
The largest number is the one with the largest exponent
since 5 > either 6 or 7
your choice of A is correct 
Math  Melanie, Monday, March 28, 2011 at 6:22pm
Yeah that's what I thought. But I wasn't sure which was greater, the larger exponent or the smaller one. It's kinda confusing when your dealing with decimals and negative exponents. But thankss :)