What is 0.685 written in scientific notation?
a. 685×10^−9
b. 68.5×10^−8
c. 6.85×10^−8
d. 6.85×10^−7

answer: you could try asking a family member maybe?

your answer would be (a)

answer

explanation

the given equation is

we can rewrite this as:

let

then the equation becomes:

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

we factor by grouping to obtain:

apply the zero product property to get:

but

whats the question? im not quite understanding your question.