Which statement explains how commercial land use negatively impacts watersheds? Chemicals in fertilizers run off into water and cause algae blooms. Production of clothing items makes pollutants that contaminate the water. Chemicals from lawn maintenance leach into water and are washed into rivers. Motors from boats and wave runners leak fuel pollutants into water and affect fish.

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)