What are the possible rational zeros of f(x) = x4 + 2x3 − 3x2 − 4x + 20? (1 point)
1 answer:
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It is a function because every Celsius temperature is associated with only one Fahrenheit temperature. Therefore, option B is true.
<h3>How to convert Celsius into Fahrenheit ?</h3>We are given that the temperature in degrees Celsius C can be converted to degrees Fahrenheit F
We know that the formula
If we are substituting c = -40
Then, we get
For every Celsius temperature, we get only one value of Fahrenheit.
The function is one-one because for every value of Celsius we get a unique value of Fahrenheit.
Hence, it is a function because every Celsius temperature is associated with only one Fahrenheit temperature.
Therefore, option B is true.
Learn more about temperature scale here:
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Answer:
a) i) The drawing of Zeno's route is attached
ii) The bearing of Zeno's return journey is 241° from point C to point A
b) Yes, Zeno returns to Port A before 5.15pm
Step-by-step explanation:
a) i) Please find attached the drawing of Zeno's route
ii) From the attached diagram of Zeno's route created with Microsoft Whiteboard, we find the bearing of his return journey as 241° from point C to point A
b) The distance from point C to point A = 10·√5 km
The speed with which Zeno sails as he returns = 10 km/h
The time it takes Zeno to return t = Distance/Speed
∴ The time it takes Zeno to return t = 10·√5 km/(10 km/h) = √5 h ≈ 2.2361 hours ≈ 2 hours 14 minutes and 9.845 seconds
The time Zeno arrives at point A from point A ≈ 3.00 pm + 2 hours 14 minutes and 9.845 seconds = 5:14.1641 p.m. ≈ 5:14 pm.
Therefore, Zeno returns to Port A before 5.15pm.
