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Solving nonlinear inequalities [Solved!]

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 &lt; = t as opposed to "0 &lt; 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

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 &lt; t &lt; 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

2000

X

2000

Re: Solving nonlinear inequalities

Correct. And is that greater than 500?

X

Correct. And is that greater than 500?

Re: Solving nonlinear inequalities

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&gt;= 0.  Thanks.

Re: Solving nonlinear inequalities

You're welcome!

X

You're welcome!

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