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

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

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

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

2.1×10−4

Answer 1

To multiply \( 0.75 \) by \( 2.8 \times 10^{-5} \), you can follow these steps:

1. Multiply the coefficients: \[ 0.75 \times 2.8 = 2.1 \]

2. Retain the power of 10: \[ 10^{-5} \]

3. Combine the results: \[ 2.1 \times 10^{-5} \]

Therefore, the answer is: \[ \boxed{2.1 \times 10^{-5}} \]