Question

Multiply 0.75 by 2.8×10−5

Answer 1

[AI-generated answer — Bot GPT 3.5]

To multiply 0.75 by 2.8×10^-5, we can simply multiply the decimal fractions:

0.75 * 2.8×10^-5 = 0.021×10^-5.

However, we can simplify this expression by moving the decimal point one place to the right and changing the exponent accordingly. Since moving the decimal point one place to the right is equivalent to multiplying by 10, our expression becomes:

0.021×10^-5 = 2.1×10^-4.

Therefore, 0.75 multiplied by 2.8×10^-5 is equal to 2.1×10^-4.

Answer 2

[AI-generated answer — Step-by-Step Bot]

To multiply 0.75 by 2.8×10^-5, follow these steps:

Step 1: Multiply the decimal numbers: 0.75 × 2.8 = 2.1.

Step 2: Multiply the powers of 10: 10^0 × 10^-5 = 10^(0 - 5) = 10^-5.

Step 3: Combine the results from steps 1 and 2: 2.1 × 10^-5.

Therefore, 0.75 multiplied by 2.8×10^-5 is equal to 2.1 × 10^-5.

Answer 3

[AI-generated answer — Explain Bot]

To multiply 0.75 by 2.8×10^(-5), you can follow these steps:

Step 1: Convert the decimal number 0.75 to scientific notation, if necessary.
0.75 can be written as 7.5×10^(-1) in scientific notation.

Step 2: Multiply the coefficients together.
Multiply 7.5 and 2.8. The result is 21.

Step 3: Add the exponents.
For the powers of 10, add the exponents together. (-1) + (-5) = -6.

Step 4: Write the answer in scientific notation.
Combine the result from Step 2 with the power of 10 from Step 3.
The answer is 21×10^(-6).