Answer:
2.8 * 10^-3 - 0.00065 = -3.7 * 10^-3
Explanation:
2.8 * 10^-3 - 0.00065 = 2.8 * 10^-3 - 6.5 * 10^-4
To subtract the two numbers, we need to express them with the same power of 10. We can do this by multiplying 6.5 * 10^-4 by 10:
2.8 * 10^-3 - 6.5 * 10^-4 * 10
Simplifying:
2.8 * 10^-3 - 6.5 * 10^-3
To subtract, we can align the powers of 10 and subtract the coefficients:
2.8 * 10^-3 - 6.5 * 10^-3 = (2.8 - 6.5) * 10^-3
= -3.7 * 10^-3
Therefore, 2.8 * 10^-3 - 0.00065 = -3.7 * 10^-3 in scientific notation.