I think it is 8 but im not sure(sorry if its wrong)
Answer:
3.6477seconds
Step-by-step explanation:
Sarah the cheetah ran the 100 meters in 5.9523s. Subtract 5.9523 from 9.6
We are given with the rate of change of the base, db/dt equal to 1 ft/ sec and the rate of change of the height of the triangle, dh/dt equal to 2 ft/sec. b is 10 ft and h is 70 ft. Area of triangle is equal to A= 0.5 bh The rate of change of the area is equal to dA/dt = 0.5 b dh/dt + 0.5 h db/dt. Substituting, dA= 0.5*10*2 + 0.5*70 * 1 equal to 45 ft2 / sec.
In the image below, I showed my work. What you basically do is find the greatest perfect square in each variable and you pull it out of the radical.
