Multiply in Scientific Notation Quick Check

Question

5 of 55 of 5 Items
Question
Multiply 0.75 by 2.8×10−5
.(1 point)
Responses

2.1×10−5
2 point 1 times 10 to the negative 5 power

2.1×10−6
2 point 1 times 10 to the negative 6 power

2.1×10−7
2 point 1 times 10 to the negative 7 power

2.1×10−4
2 point 1 times 10 to the negative 4 power

Answer 1

To multiply in scientific notation, multiply the decimal numbers and add the exponents.

0.75 * 2.8 = 2.1

The exponent of 10 is the sum of -5 and 0 (since there are no powers of 10 in 0.75).

Therefore, the answer is 2.1 × 10^0.

Since any number (except 0) raised to the power of 0 is 1, the final answer is simply 2.1 without any power of 10.

So, the correct response is: 2.1