Math! Please Check My Awnser!
posted by Electro on .
Hello! I need some help with math! I have tried to do this but I am unsure about my answers. My I will identify my answers with a "<". Also, if I have missed one, please tell me the right answer! Also, Thanks for your help in advance! Have a nice day!
1. Which of the following expressions is written in scientific notation?
a. 73.4 x 10^5 < My Answer!
b. 0.09 × 10^7
c. 80 x 10^3
d. 4.22 x 10^–3
2. Which of the following is 0.0000000708 written in scientific notation?
a. 7.08 x 10^–8
b. 7.8 x 10^–8
c. 708 x 10^–10 < My Answer!
d. 70.08 x 10^–9
3. Which expression represents the largest number?
a. 40.1 x 10^–6
b. 4.1 x 10^–7
c. 0.411 x 10^–7
d. 0.04001 x 10^–5 < My Answer!
4. Which expression is equal to 1/8000 written in scientific notation?
a. 8.0 x 10^3
b. 1.25 x 10^–4
c. 125 x 10^–5 < My Answer!
d. 1.25 x 10^4
5. Which of the following statements is NOT true regarding an expression written in scientific notation in the form of a x 10^n ?
a. The value of a must be greater than or equal to 1 and smaller than 10.
b. The value of n must be an integer.
c. Doubling n results in a doubling of the value of the expression. < My Answer!
d. Doubling a results in a doubling of the value of the expression.
6. Which number is equal to 7(3.5 x 10^4) written in scientific notation?
a. 24.5 x 70^4
b. 2.45 x 10^5
c. 24.5 x 10^4
d. 1.05 x 10^5 < My Answer!

Please someone help me!

Pls :

1. Which of the following expressions is written in scientific notation?
a. 73.4 x 10^5 < My Answer!
b. 0.09 × 10^7
c. 80 x 10^3
d. 4.22 x 10^–3 NO ,___< ONE digit left of decimal. That is the whole idea.
2. Which of the following is 0.0000000708 written in scientific notation?
a. 7.08 x 10^–8 ____HERE<
ONE digit left of decimal
b. 7.8 x 10^–8
c. 708 x 10^–10 < My Answer!
d. 70.08 x 10^–9
3. Which expression represents the largest number?
a. 40.1 x 10^–6 = 4.01*10^5 THE WINNER
b. 4.1 x 10^–7
c. 0.411 x 10^–7
d. 0.04001 x 10^–5 < My Answer! THIS IS 4.001 * 10^7 which is smaller than b or a
4. Which expression is equal to 1/8000 written in scientific notation?
1/8 = .125 (we all know that)
so .125*10^3 = 1.25 * 10^4
a. 8.0 x 10^3
b. 1.25 x 10^–4 THIS IS MY ANSWER
c. 125 x 10^–5 < My Answer!
d. 1.25 x 10^4
5. Which of the following statements is NOT true regarding an expression written in scientific notation in the form of a x 10^n ?
a. The value of a must be greater than or equal to 1 and smaller than 10.
b. The value of n must be an integer.
c. Doubling n results in a doubling of the value of the expression. < My Answer! !!!RIGHT !!!!
d. Doubling a results in a doubling of the value of the expression.
6. Which number is equal to 7(3.5 x 10^4) written in scientific notation?
MY WAY 7*3.5 = 24.5
24.5 * 10^4 = 2.45*10^5
a. 24.5 x 70^4
b. 2.45 x 10^5 << BUT THIS IS MINE
c. 24.5 x 10^4
d. 1.05 x 10^5 < My Answer! 
OMG! Thank You so much!

Hey here are the right answers
1.D
2.A
3.A
4.B
5.C
6.B
I just failed the test thanks to them so here are the correct answers !!!! 
Thea^ is right and 7. is A

The answers above are ALL CORRECT!

thea and anon are right

I got 100% thanks!

they changed the questions and i got most of them wrong

All of those answers are Wrong it's
A
A
B
C
B
C
A 
i hate stupid idiots like you lilly.. just for someone in the future. Lillys answers are all freaking wrong i just got a fu*king 3/7 from her answers. the ACTUAL answers are D,A,B,B,C,B,A .... stupid idiots want people to get a bad score. I seriously hate stupid lilly girl go f*ck yourself stupid b*ch