Answer:
400h=mi
Step-by-step explanation: 400 hours = miles which is an equation above.
The relation that is a function is relation (b)
<h3>How to determine the
relation that is a
function?</h3>
The ordered pairs in the option represent the given parameters
For a relation (i.e. the ordered pairs) to be a function, the following must be true:
Each y value on the ordered pair must have exactly one x value
i.e. no x value must point to the different y value
Having said that the relation that is a function is relation (b)
Hence, the the relation that is a function is relation (b)2
Read more about functions at
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Answer: B = (1,-9)
Step-by-step explanation:

A) A = 40m + 300
b) 820 = x12 + 100
x = 60
B = 60m + 109
Answer:
The half-life of the radioactive substance is 135.9 hours.
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