A big blue ball! You can see a big blue ball. Select the two properties of light that enable you to see the ball. A)energy and wavelength)reflection and absorption)reflection and refraction)absorption and transmission

Reflection and absorption

Explanation:

When a light falls on an object,some light waves are absorbed by the object,and the rest are reflected back.This reflected light is what make us see the object.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.