The function f(x) = -x2 - 7x + 30 shows the relationship between the vertical distance of a diver from poll's surface f(x), in feet, and the horizontal distance x, in feet, of a diver from the diver board. what is a zero of f(x) , and what does it represent? a.) x = 10; the diver hits the water 10 feet away horizontally from the boredb.) x =3; the diver hits water 3 feet away horizontally from the boredc.) x=10.; the diver jumps in the pool 10 second peer second d.) x=3; the diver jumps in at 3 feet per second

Which of the following represents a negatively charged ion? of t 7

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

Amines amides and amino acids are categories of