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

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

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

2.1×10−4

Answer 1

To multiply 0.75 by 2.8×10^−5, you multiply the decimal numbers together and add the exponents of the powers of 10. Therefore, the correct answer is 2.1×10−5.