Which of the following is greater than 4.3x10^9
A. 2.1x10^9
B. 3.2x10^9
C. 5.3x10^9***
D. 7.4x10^8
Which of the following is less than 6.5x10^-5
A. 1.4x10^-3***
B. 2.5x10^-4
C. 7.8x10^-5
D. 4.6x10^-6
According to the 2010 census the population of Nebraska was 1.8x10^6 people. Which state had a smaller population?
A. California: 3.7x10^7
B. Rhode island: 1.1x10^6***
C. Texas: 2.5x10^7
D. Missouri: 6x10^6
Which number is greater than 5.5x10^-7 and less than 5.5x10^7
A. 1.8x10^-12
B. 6.7x10^8
C. 5.2x10^3***
D. 3.9 x 10^-8
first answer ---- correct
2nd answer ---- wrong, to have a number less than 6.5x10^-5,
look for an exponent less than -5, I see 4.6x10^-6 , the correct answer.
3rd answer ---- correct
4th answer ---- I see 2 numbers which are > than 5.5x10^-7
namely 6.7x10^8 and 5.2x10^3 , notice their exponents are greater than the exponent of 5.5x10^-7
I also see 2 numbers which are < 5.5x10^-7
namely 1.8x10^-12 and 3.9 x 10^-8 , notice their exponents are less than the exponents of 5.5x10^-7
1 c
2 d
3c
4c
am i correct?
You should have numbered your questions
In #3 you had picked Rhode Island, which I said was correct, and now you pick Texas. ???
srry i meant rhode island
now r my answers correct?
To compare numbers written in scientific notation, we need to compare the coefficients and the exponents separately.
1. For the first question:
The number 4.3x10^9 has a coefficient of 4.3 and an exponent of 9.
- To answer which of the given options is greater, we compare the coefficients first.
- The coefficient values of the given options are:
A. 2.1, B. 3.2, C. 5.3, D. 7.4
- Comparing the coefficients, we can see that 5.3 is greater than 4.3.
- Therefore, option C, 5.3x10^9, is greater than 4.3x10^9.
2. For the second question:
The number 6.5x10^-5 has a coefficient of 6.5 and an exponent of -5.
- Again, we compare the coefficients of the given options:
A. 1.4, B. 2.5, C. 7.8, D. 4.6
- Comparing the coefficients, we can see that 1.4 is less than 6.5.
- Therefore, option A, 1.4x10^-3, is less than 6.5x10^-5.
3. For the third question:
The population of Nebraska is 1.8x10^6 people.
- To determine which state has a smaller population, we compare the coefficients.
- The population options are:
A. 3.7x10^7, B. 1.1x10^6, C. 2.5x10^7, D. 6x10^6
- Comparing the coefficients, we can see that 1.1 is less than 1.8.
- Therefore, option B, Rhode Island with 1.1x10^6, has a smaller population than Nebraska.
4. For the fourth question:
We need to find a number that is greater than 5.5x10^-7 and less than 5.5x10^7.
- We can eliminate options A and D because they are not within the given range of exponents.
- The remaining options are B and C: 6.7x10^8 and 5.2x10^3.
- We compare the coefficients:
- 6.7 is greater than 5.5.
- 5.2 is less than 5.5.
- Therefore, the answer is option C, 5.2x10^3.