Which of the following is less than 6.5 × 10^–5
A. 1.4 × 10^–3
B. 2.5 × 10^–4
C. 7.8 × 10^–5
D. 4.6 × 10^–6
I think it's either A or B, and I'm leaning more towards A.
6.5*10^-5/ 4.6*10^-6 = 14.1
The numerator is 14 times the denominator. So the answer is D.
Okay, thank you!
Is this right?
To compare the given expressions, we need to convert them to decimal form. This can be done by multiplying the coefficient (the number in front of the multiplication sign) by the power of 10.
For option A:
1.4 × 10^–3 = 0.0014
For option B:
2.5 × 10^–4 = 0.00025
Now, we compare these decimal values to 6.5 × 10^–5:
0.0014 > 0.000065 (6.5 × 10^–5 in decimal form)
0.00025 > 0.000065
Neither option A nor option B is less than 6.5 × 10^–5.
To check the remaining options:
For option C:
7.8 × 10^–5 = 0.000078
0.000078 > 0.000065
For option D:
4.6 × 10^–6 = 0.0000046
0.0000046 < 0.000065
Therefore, the correct answer is option D, 4.6 × 10^–6, as it is the only option that is less than 6.5 × 10^–5.