As the number of carbon atoms in a molecular formula increases, the number of possible isomers a. increases rapidly.
b. decreases.
c. increases slowly.
d. remains the same.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

0.88m hope i am correct : )