A rock is tossed off a balcony. Its height (in feet) is given by the formula
h
(
t
)
=
−
16
t
2
+
7.7
t
+
130
, where
t
is measured in seconds.
How long will it take the rock to hit the ground?
Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.