Need
the diameter of a hydrogen atom is about 5×10^-15 meter. suppose 8.4×10^8 hydrogen atoms were arranged side by side in a straight line. multiply these numbers to find the length of this line of atoms. what is the length in scientific notation?

select one:

a. 4.2×10^−2 meter
b. 0.042 meter
c. 42×10^−3 meter
d. 4.2×10^−3meter

I'm a few years late, lol, but um the answer is 42 x meters

For all the people who still need the answer.

Step-by-step explanation:

5 x and 8.4 x

5 x 8.4 = 42  (multiply like terms)

+ =  (add the exponents)

42 x

look a the sides they are perpendicular

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers