Homework Help: Math help

Posted by Deborah on Thursday, January 10, 2013 at 1:03pm.

Which number is equal to 7(3.5 x 10to the 4th) written in scientific notation?
A.24.5 x 70to the 4th
B.2.45 x 10 to the 5th
C.24.5 x 10 to the 4th
D.1.05 x 10 to the 5th

I think it is B...?

Math help - Steve, Thursday, January 10, 2013 at 2:01pm
7*3.5 = 24.5, so you have 24.5*10^4

but scientific notaion requires a value less than 10, so you have to raise the power by one. (B)
Math help - ruby, Friday, January 11, 2013 at 12:03am
Describe 2 polygons by the number of vertices and sides each has
Math help - ruby, Friday, January 11, 2013 at 12:04am
Describe 2 polygons by the number of vertices and sides each has
Math help - Amethyst, Monday, April 1, 2013 at 10:27am
Choice-f

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