Question

The cost of cleaning up pollution in a stream is given by C = 37000 100−p, where C is the cost in dollars to clean p percent of the stream. (For instance, when p is 20, then the formula will calculate the cost to clean up 20 percent of the stream.) p must be greater than or equal to zero and p must be less than what number? Why?

Answer 1

Answer:

$0\leq p$

Explanation:

We have in the problem the following expression,

$c=3700(100-p)$

Where

c= cost in dollar

p= is percent of stream (Which $p\geq 0$)

P must be greater or equal to 0 but as well must be less than 100%

so we define the interval

$0\leq p$

If the value were equal to 100 the cost would be the equivalent of 0 and there would be no profit / gain.