A hydrogen atom is about 5×10 to the -11 power –
11 meters across. The width of a human hair is 2×106 to 6 times as big. How many meters across is a human hair?
Write your answer in scientific notation.

b. 2

step-by-step explanation:

the slope of a line =δy/δx

δy= y₂-y₁

δx= x₂-x₁

therefore, using the points (-2,-3)   and (3,7) we can calculate gradient as follows:

m=(7--3)/(3--2) (a number minus a negative number the sign changes to a plus)

m=(7+10)/(3+2)

=10/5

=2

step-by-step explanation:

moderators are