anonymous one year ago Write 230,000,000,000 in scientific notation

1. anonymous

put a decimal between the 2 and the 3 then count the decimal place until the end how many do you get?

2. anonymous

$230,000,000,000$ $2.\overbrace{30~000~000~000}^{\text{count these places}}$

3. anonymous

11

4. anonymous

me too!

5. anonymous

final answer $\huge 2.3\times 10^{11}$

6. anonymous

thank you @satellite73

7. anonymous

yw

8. anonymous

You think you can help with a couple more

9. anonymous

sure

10. anonymous

If f(x) = -2x2 + 8x - 4, which of the follwoing is true? A. The maximum value of f(x) is -4. B. The graph of f opens upward. C. The graph of f has no x-intercept D. f is not a one to one function.

11. anonymous

*Following

12. anonymous

want to graph it?

13. anonymous

Sure

14. anonymous

i don't mean by hand, i mean by machine

15. anonymous
16. anonymous

A. The maximum value of f(x) is -4. definitely false, the max is probably 4, not -4

17. anonymous

B. The graph of f opens upward. also false, as we know since the leading coefficient is negative (it is $$-2$$) it opens down

18. anonymous

C. The graph of f has no x-intercept another false one it crosses the x axis twice

19. anonymous

that leaves...

20. pooja195

D .-.

21. anonymous

D

22. anonymous

imagine

23. anonymous

anyways we could have known that from the beginning a parabola is not one to one

24. anonymous

Here's the last question

25. anonymous

ooh goodie

26. anonymous

3log3(-5) = A. -5 B. 3 C. 9 D.undefined

27. anonymous

you cannot take the log of a negative number ever you will break out if you try go with D

28. anonymous

Ok thanks @satellite73

29. anonymous