How long can it take for primary forest succession to reach the climax, or old-growth, forest? 5 to 20 years

1 to 3 years

250 to 600 years

70 to 100 years

When the following equation is balanced using the smallest possible integers, what is the coefficent of oxygen gas? c7h16o(g) + o2(g) → co2(g) + h2o(g) -1 -5 -8 -16 -21

Can someone me with questions 15 to 17 plz.

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d