Find the area of each figure, round your answer to one decimal place if necessary.

The spotter on the ground is standing beneath the safety net. what is his distance from the base of the platform, to the nearest meter? 3 meters, 2 meters, 4 meters, 1 meter?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1