Which statement is true about the diagram? A)∠DEF is a right angle.B) m∠DEA = m∠FEC C) ∠BEA ≅ ∠BEC D) bisects ∠AEF
2 answers:
Answer:
C. .
Step-by-step explanation:
We have been given a diagram of angles formed by intersecting lines. We are asked to choose the correct option but our given diagram.
Upon looking at our given choices we can see that only option C is the correct choice as we can see from our given diagram that .
Therefore, angle BEA is congruent to angle BEC.
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Answer:
The rocket hits the ground at a time of 11.59 seconds.
Step-by-step explanation:
The height of the rocket, after x seconds, is given by the following equation:
It hits the ground when , so we have to find x for which
, which is a quadratic equation.
Finding the roots of a quadratic equation:
Given a second order polynomial expressed by the following equation:
.
This polynomial has roots such that
, given by the following formulas:
In this question:
So
Since time is a positive measure, the rocket hits the ground at a time of 11.59 seconds.