Which number is written in scientific notation? a) 7.8 x 10^-5 b) 3.4 x 100^2 c) 0.84 x 10^6 d) -5 x 10^-12

I would say A. 7.8 x 10^-5

Step-by-step explanation:

7.8 x 10^-5 can also be written as 7.8 times 10 to the negative fifth power or the exponent of negative five. But, if you solve it you would get 0.000078 as the real number.

hey seth! : )

i’m not 100% sure, but i think it’s b

hope this ya : p

miss u!

- nicole

u bout ugly as   a mf

step-by-step explanation: lol