# Solving nonlinear inequalities [Solved!]

**phinah** 08 Jul 2017, 17:59

### My question

Concerning #2 in the exercises: why, in the answer, is 0 < = t as opposed to "0 < t "? Thanks.

### Relevant page

3. Solving Non-Linear Inequalties

### What I've done so far

Wondered why the answer includes equal sign at one end, while the question says "greater than".

X

Concerning #2 in the exercises: why, in the answer, is 0 < = t as opposed to "0 < t "? Thanks.

Relevant page
<a href="/inequalities/3-solving-non-linear-inequalities.php">3. Solving Non-Linear Inequalties</a>
What I've done so far
Wondered why the answer includes equal sign at one end, while the question says "greater than".

## Re: Solving nonlinear inequalities

**Murray** 08 Jul 2017, 20:36

As the solution says, the values where the mass will be greater than 500 is `-150 < t < 10`.

But the rocket is fired at `t = 0`, so we don't count values less than that.

At `t = 0`, what is the mass of fuel?

X

As the solution says, the values where the mass will be greater than 500 is `-150 < t < 10`.
But the rocket is fired at `t = 0`, so we don't count values less than that.
At `t = 0`, what is the mass of fuel?

## Re: Solving nonlinear inequalities

**phinah** 10 Jul 2017, 15:14

2000

## Re: Solving nonlinear inequalities

**Murray** 10 Jul 2017, 20:05

Correct. And is that greater than 500?

X

Correct. And is that greater than 500?

## Re: Solving nonlinear inequalities

**phinah** 12 Jul 2017, 10:41

Yes. Now I see it. So since it IS 2000 when t = 0 then the inequality would include t>= 0. Thanks.

X

Yes. Now I see it. So since it IS 2000 when t = 0 then the inequality would include t>= 0. Thanks.

## Re: Solving nonlinear inequalities

**Murray** 12 Jul 2017, 18:07

You're welcome!

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