## Destinyyyy one year ago Help with last problem..

1. Destinyyyy

2. Destinyyyy

f(10)- f(0)/ 10-0 = (1.5 square root 10 +28.6) - (1.5 square root 0 +28.6)/ 10-0 Is that correct? Average rate of change was a few units ago. Need a refresher

3. Destinyyyy

@Nnesha @phi

4. anonymous

yes

5. Destinyyyy

Okay. Next I get rid of the parenthesis and distribute the - correct?

6. anonymous

hmmm hold on

7. anonymous

i don't bout this one but i think so i cant be too sure tho

8. ankit042

= 1.5*sqrt(10)

9. Destinyyyy

?

10. phi

yes, your idea is correct f(10)- f(0)/ 10-0 or $(1.5 \sqrt{10} + 28.6 - 1.5 \sqrt{0} - 28.6)/10$ notice the constant 28.6 subtracts off also the term 1.5 sqr(0) is just 1.5*0 =0 so it simplifies to $0.15 \sqrt{10}$ now use a calculator or type 0.15*sqrt(10)= into google and round the answer to the nearest 10th

11. Destinyyyy

It says .47

12. Destinyyyy

How did you get 0.15.. Shouldn't it stay as 1.5?

13. Destinyyyy

14. phi

How did you get 0.15.. Shouldn't it stay as 1.5? the "bottom" is 10 remember? ( f(10) - f(0) )/ (10 -0) the top simplifies to $$1.5\sqrt{10}$$ but we divide that by 10

15. Destinyyyy

You put 0.15

16. Destinyyyy

I thought it was 1.5. But above you put 0.15

17. phi

yes $\frac{1.5\sqrt{10}}{10}= 0.15 \sqrt{10}$

18. Destinyyyy

Ohh okay