0.25% increase per every one million, if I have a one billion

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.

x = 3 ± √(5+y)

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.

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