## anonymous one year ago Help plz!

1. anonymous

2. misty1212

careful careful here this can be very confusing

3. misty1212

lets go nice an slow ok?

4. anonymous

It is. I want to work it out

5. misty1212

we need to do three things ready?

6. anonymous

yes

7. misty1212

first lets multiply the numbers out front $4.5\times6 = ?$

8. anonymous

27

9. misty1212

right notice that it is larger than 10, so we will have to adjust something put that aside for a second and add the exponents $-8+(-4)=?$

10. anonymous

It is D

11. anonymous

-12

12. misty1212

right

13. misty1212

so one answer (not the final one) is $27\times 10^{-12}$

14. misty1212

you can't use $$27$$ because it is larger than 10 so you have to use $$2.7$$ that means you have to change the exponent as well

15. misty1212

when you go from $$27$$ to $$2.7$$ you are dividing by 10 to compensate you have to add 1 to the exponent what i s$$-12+1$$?

16. anonymous

im back sorry it's -11 SO that means it's D.

17. anonymous

tysm @misty1212! I got a 100%!!!