Question

Write 230,000,000,000 in scientific notation

Answer 1

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

Answer 2

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

Answer 3

11

Answer 4

me too!

Answer 5

final answer \[\huge 2.3\times 10^{11}\]

Answer 6

thank you @satellite73

Answer 7

yw

Answer 8

You think you can help with a couple more

Answer 9

sure

Answer 10

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.

Answer 11

*Following

Answer 12

want to graph it?

Answer 13

Sure

Answer 14

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

Answer 15

http://www.wolframalpha.com/input/?i=+-2x^2+%2B+8x+-+4

Answer 16

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

Answer 17

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

Answer 18

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

Answer 19

that leaves...

Answer 20

D .-.

Answer 21

D

Answer 22

imagine

Answer 23

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

Answer 24

Here's the last question

Answer 25

ooh goodie

Answer 26

3log3(-5) =

A. -5
B. 3
C. 9
D.undefined

Answer 27

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

Answer 28

Ok thanks @satellite73

Answer 29

yw
https://www.youtube.com/watch?v=pWRJAHaOrYg