The function f(x) = -x2 - 9x + 10 shows the relationship between the vertical distance of a diver from a pool's surface f(x), in feet, and the horizontal distance x, in feet, of a diver from the diving board. what is a zero of f(x), and what does it represent?

F(x) is the vertical distance from the diver to the water
the zero is when the diver hits the water
find the value of x that make f(x)=0

0=-x²-9x+10
undistribute -1
0=-1(x²+9x-10)
what 2 numbers multiply to -10 and add to get 9
-1 and 10
0=-1(x+10)(x-1)
set to zero

x+10=0
x=-10, false, you can't go a negative distance

x-1=0
x=1

the zero is at x=1 and it represents when the diver hits the water

If gravity is one third on mars then weight also one third on mars

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c