The function of f(x)=8√x gives the speed in feet per second (ft/s) of a free falling object after it has fallen x feet (ignoring air resistance). Find the speed of the object after it has fallen 10 feet. If necessary, round your answer to the nearest tenth. a. 25.3 ft/s

b. 3.2 ft/s

c. 8.9 ft/s

d. 80 ft/s

What is the measure of angle afe? 79 81 91 99

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.