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d ≥ 85 ; < - - - - - - - [85>

Step-by-step explanation:

d = how much more they have to raise

so the student council has raised $415 so far and their goal is $500, which can be expressed as the following inequality:

415 + d ≥ 500

in order to find out what d is, we solve the inequality by subtracting 415 from 500

500 - 415 = 85

so, they need $85 or more to complete their goal, which is why a greater than or equal to sign was used

the inequality can be expressed as: d ≥ 85, as we want $85 or more.

on a number line it would look similar to this:

< - - - - - - - [85>

the number 85 would have a closed circle or a bracket on it, and numbers greater than 85 would be shaded to the right

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50