Question

Without using mathematical tables or a calculator, evaluate (3.3 X 0.00025) leaving the answer in standard form (scientific notation).

a) (8.25 X 10^-4)
b) (8.25 X 10^-3)
c) (8.25 X 10^-5)
d) (8.25 X 10^-6)

Answer 1

To evaluate (3.3 x 0.00025) without a calculator or mathematical tables, multiply the numbers together and write the result in scientific notation.

Step-by-step explanation:

To evaluate (3.3 x 0.00025) without a calculator or mathematical tables, we can use the rules of scientific notation. We need to multiply the two numbers together and write the result in scientific notation.

3.3 x 0.00025 = 0.000825

Now, we need to express this result in scientific notation. Since 0.000825 is less than 1, we can move the decimal point to the right until we get a number between 1 and 10.

0.000825 = 8.25 x 10^-4

Therefore, the correct answer is a) (8.25 x 10^-4).