Suppose water is leaking from a cubical tank through a circular hole
of area Ah at its bottom. When water leaks through a hole,
friction and contraction of the stream near the hole reduce the
volume of the water leaving the tank per second to cAh2gh−−−√,
where c(0 differential equation for the height h of water at time t. The radius of the hole is 2 in and
g = 32 ft/s2.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?