Multiply 0.75 by 2.8×10−5

Question

.(1 point)
Responses

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

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

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

2.1×10−7

Answer 1

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

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

2. Keep the exponent: Since we are multiplying by a power of ten, the exponent remains the same: \[ 2.1 \times 10^{-5} \]

Putting this together, we get: \[ 0.75 \times 2.8 \times 10^{-5} = 2.1 \times 10^{-5} \]

Thus, the correct response is: 2.1×10−5 (2 point 1 times 10 to the negative 5 power).