Can you check my answers? I cannot figure out what I did wrong!!

Question

What is the value of the expression ? I got   

What value of n solves the equation? I got -3

What is 10^6 in standard form? I got 1,000,000

What is 100,000,000 written as a power of ten? I got 10^8

What is 2.45 × 104? I got 24,500.

(These are just practice problems but I seriously need to know what  i did wrong!)

Answer 1

5^-5...1/(5^+5)

5^5=3,125

anser=1/3,125=0.00032

Comments

Muneepenee. . .check the original problem.  Is not 5^-5.  Is 1/5^-5.

Answer 2

1 / 5^-5 = 5^5 = 3125

2.45 * 104 = 254.8

What is 10^6 in standard form?  Yes, 1,000,000 looks right, but make sure.  It looks like 'standard form' is mostly used to mean the way we write numbers most of the time (like 1,000,000 or 632, etc.), but it looks like 'standard form' is used in Great Britain to mean scientific notation.  See links below:

http://www.mathsrevision.net/gcse-maths-revision/number/standard-form

http://www.mathatube.com/writing-num-standard-form.html

http://www.mathsisfun.com/algebra/standard-form.html