Anyone know what number is higher for the area of this pentagon, other than 62.5. Using the lengths of it's sides and perimeter. Ok thanks!

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

In the diagram of circle o, what is the measure of zabc?

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2