# Math

Hi everyone! I am extremely struggling with this questions and was hoping someone would go over them with me. Thank you!

1. Which of the following expressions is written in scientific notation?

a. 73.4 x 10^5
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
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
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
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.
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

1.D
2.B
3.A
4.A
I do not have the rest because I am still confused about them. If anyone could help that would mean so much to me. Thank you!

1. 👍 2
2. 👎 0
3. 👁 1,264
1. 1D ok

2A You count leading zeros for the exponent, but you cannot ignore any zeroes after the first nonzero digit. They are part of the value.

3A ok

4B 1/8000 = 0.000125
your answer is for 8000, not 1/8000

5C
doubling n doubles then exponent, roughly equivalent to squaring the number. 10^6 = 10^3*10^3, not 2*10^3

6B
7(3.5*10^4) = 7*3.5*10^4 = 24.5*10^4 = 2.45*10^5
B and C are the same value, but C is not in scientific notation.

1. 👍 0
2. 👎 0
posted by Steve
2. Thanks for the help. I and the same questions.

1. 👍 0
2. 👎 0
posted by Victoria
3. 1-D
2-A
3-D
4-B
5-C
6-B
7-A

1. 👍 5
2. 👎 0
posted by Nachelle
4. 3 is actually A, but Nachelle is correct with the rest.

1. 👍 4
2. 👎 0
posted by Krista
5. lesson 2 scientific notation:
1. D
2. A
3. A
4. B
5. C
6. B
7. A
yay 100% thank you Nachelle & krista!!

1. 👍 4
2. 👎 1
6. Thank you so much I got 100!

1. 👍 0
2. 👎 0
7. Yeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

1. 👍 0
2. 👎 0
posted by :P
8. I didn't read the part that 3 is A but it would've been right if it was a. Thx guys. Krista is right. Also, thx rachelz and nachelle

1. 👍 0
2. 👎 0
posted by Kelly
9. Qns1 d
Q2.a
Q3.d
Q4.b
Q5.a
Q6.b

1. 👍 1
2. 👎 0
10. 1. D
2. A
3. A
4. B
5. C
6. B
7. A

100% just finished test on 9th grade Connexus have fun

1. 👍 1
2. 👎 0
posted by Omg

## Similar Questions

1. ### Algebra

Questions on piecewise function graphing Obviously I can't get help with the actual graphing here but I am hoping someone can push me in the right direction Problem: f(x) {4, if 0

asked by Linda on September 6, 2011
2. ### GEOGRAPHY (URGENT!!!)

I NEED HELP!!! this is urgent!!! Human-Environmental Interactions: how did the people in Khartoum modify the environment? how is the people in khartoum being influence by the physical landscape/environment? sorry my grammar sucks

asked by NEED HELP URGENT!!! on November 18, 2010
3. ### ENGLISH/MATH/SCIENCE HELP!

Is there any websites for teens to read short stories (or long), then you answer ONLY multiple choice questions, grade you, and to have a profile or something to see all of your grades if your making progress each time (to see if

asked by Laruen on March 9, 2013
4. ### RE

i am really struggling with my re homework and i would really appreciate any help any one can give me. i have 5 questions i need to answer ive managed to answer 4 of them but i am struggling with this one:- What points do

asked by Elsie on June 19, 2009
5. ### English

I am extremely struggling in IB junior English. How can I survive that class. I put a lot effort too, but the teacher is grading on what we really know.

asked by Anonymous on April 13, 2013
1. ### NVQ level 3 buisness admin

ok im really struggling on the questions on unit 314 hy the hell is there no question marks i have to anwser them like questions,its confusing me?? please can anyone shed a light over my way please.x cheers ema We don't have

asked by emma on June 12, 2006
2. ### Geology

Hi, I am doing a geology course and I am really struggling with the topography graph. Currently, I am doing a test/quiz that involves me finding out what the contour interval is,the elevations of lines, and so on. I have tried

asked by Caroline on July 18, 2014
3. ### English

1. What are people in the Netherlands hoping for? 2. What are people of the Netherlands hoping for? -They are hoping for another cold weather. -------------------- Which is right, 'in' or 'of' before the Netherlands? 3. How long

asked by rfvv on October 19, 2014
4. ### High School Algebra II

Hey friends, I have a big assignment I've been given that I really, really could use an 100% on. I've been working on it for hours and have a decent amount done, have had teacher help, and have had friends work with me on it, but

asked by J on March 8, 2015
5. ### Writing

Writeacher, I need you to tutor me on writing essays. It is really important in college and as a high schooler it is extremely important to be solid at writing. I am struggling and need tutoring. What will the first lesson be?

asked by Anonymous on August 2, 2013

More Similar Questions