Homework Help: Math

Posted by Yoda on Tuesday, September 18, 2012 at 3:15pm.

3. What makes the statement true? 7^–2 =?

4. Evaluate the expression 6^-2 • 4^0?

5. Write 5^2 • 5^-1 • 5^3 as a single exponent.

9. What is the solution to (4 × 10^3) × (6 × 10^6), written in scientific notation?

11. Find the product.
1/10 • 4/10

Math - Yoda, Tuesday, September 18, 2012 at 3:32pm
Plz help me
Math - Steve, Tuesday, September 18, 2012 at 3:53pm
7^-2 = 1/7^2 = 1/49

6^-2 = 1/6^2 = 1/36
4^0 = 1 (as does any number n^0)
6^-2 • 4^0 = 1/36 * 1 = 1/36

5^2 • 5^-1 • 5^3 = 5^(2-1+3) = 5^4

(4×10^3)×(6×10^6) = 4×6×10^(3+6) = 24×10^9 = 2.4×10^10

1/10 • 4/10 = 1•4/(10•10) = 4/100 = 1/25
Math - Yoda, Tuesday, September 18, 2012 at 3:57pm
Thank You so so so much :D
Math - Steve, Tuesday, September 18, 2012 at 4:18pm
My pleasure it is. :-)

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