Question

In scientific notation, what is the sum of 2.3 times 10^{-3} and 5.4 times 10^{-4}?

a. 2.84 times 10^{-3}
b. 5.63 times 10^{-3}
c. 7.7 times 10^{-7}
d. 12.42 times 10^{-12}

Answer 1

`2,3 \cdot 10^(-3)+5,4\cdot 10^(-4)=\\ 2,3 \cdot 10^(-3)+0,54 \cdot 10^(-3)=\\ 2,84\cdot 10^(-3)\\ \\ Answer:A`