0.0255999197 as a number in scientific notation

Answer 1

To express the number 0.0255999197 in scientific notation, you can move the decimal point two places to the right, which gives you 2.55999197. Since you moved the decimal point two places to the right, you need to multiply by ${10}^{-2}$.

Thus, 0.0255999197 in scientific notation is:

$$2.55999197\times {10}^{-2}$$

Answer 2

solve 8.03x10^-8-2.56x10^-2

Answer 3

To solve $8.03\times {10}^{-8}-2.56\times {10}^{-2}$, we need to express both terms with the same exponent.

First, $2.56\times {10}^{-2}$ can be rewritten with the exponent of $-8$:

$$2.56\times {10}^{-2}=2.56\times {10}^{-2}\cdot \frac{{10}^6}{{10}^6}=2.56\times {10}^4\times {10}^{-8}=25600\times {10}^{-8}$$

Now we can perform the subtraction:

$$8.03\times {10}^{-8}-25600\times {10}^{-8}=(8.03-25600)\times {10}^{-8}$$

Calculating $8.03-25600$:

$$8.03-25600=-25591.97$$

Putting it all together, we have:

$$-25591.97\times {10}^{-8}$$

We can express this value in proper scientific notation. Moving the decimal point 4 places to the right, we get:

$$-2.559197\times {10}^{-4}$$

So, the result of $8.03\times {10}^{-8}-2.56\times {10}^{-2}$ is:

$$-2.559197\times {10}^{-4}$$