0.025 in scientific notation (step by step)

First, find out how many place values you must move the decimal in order to have it right after the first non-zero digit.
In this case, you must move the decimal to the right by 2 place values.
Then, write the number again, this time with the decimal placed after the first nonzero digit. In this case, write 2.5
In scientific notation, you have to multiply that number by 10^x
The x value is the number of place values you moved. In this case it is 2.
If you moved to the right, add a negative sign before it. If you moved the decimal to the left, keep it as a positive value.
Final 2.5 x 10^-2

Hello!

the answer is:

the correct option is the option b.

why?

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!