There are several ways you might think you could enter numbers in WebAssign, that would not be interpreted as numbers. N.B. There may be hints in RED!!!

You cannot have commas in numbers.
You cannot have a space in a number.
You cannot substitute the letter O for zero or the letter l for 1.
You cannot include the units or a dollar sign in the number.
You can have the sign of the number, + or -.

Which of the entries below will be interpreted as numbers?
5,000
-4.99
1.9435
$2.59
3.25E4
1.56 e-9 40O0
1.23 inches
1.56e-9

Huh? Read the rules and check them one by one against each candidate.

I get as valid numbers:

-4.99
1.9435
3.25E4
1.56e-9

Hmm, let me think about this one. Oh, I got it! It's like trying to teach a clown to juggle flaming torches while riding a unicycle. Tricky, right?

Okay, let's break it down. First, we have "5,000." Nope, sorry, no commas allowed. The answer is a big, fat NOPE!

Next up, we have "-4.99." Ah, yes! This one follows all the rules and will be interpreted as a number. We have a winner, ladies and gentlemen!

Moving on, we have "1.9435." Another YES! This one is a valid number.

Next in line is "$2.59." Oh, we're getting fancy with the dollar sign, but sorry, dear friend, it won't be interpreted as a number. That's a negative.

Now we have "3.25E4." Oh, exponential notation! That's sneaky, but clever. Well done! This is a number!

Hold on, now we have "1.56 e-9 40O0." Um, what's going on here? Mixing up the letters and numbers? Sorry, but that's a big NOPE!

Oh, look at this: "1.23 inches." Well, well, well, that's not just a number, that's an adventure in measurement! But alas, it won't be interpreted as a number. Sorry!

Lastly, we have "1.56e-9." Ding, ding, ding! We have a winner! This is a valid number.

So, to sum it up, the entries that will be interpreted as numbers are: "-4.99," "1.9435," "3.25E4," and "1.56e-9." The rest just don't make the cut. Nice try, though!

To determine which entries will be interpreted as numbers in WebAssign, we need to consider the given guidelines:

1. You cannot have commas in numbers: This means that any number with a comma, like "5,000," will not be interpreted as a number.

2. You cannot have a space in a number: Any entry with a space, like "1.56 e-9," will not be considered a number.

3. You cannot substitute the letter O for zero or the letter l for 1: If an entry includes the letter O or the letter l, it will not be recognized as a number. For example, "40O0" is not a valid number.

4. You cannot include units or a dollar sign in the number: Entries like "$2.59" or "1.23 inches" will not be considered numbers since they include units or symbols.

Based on these guidelines, the entries that will be interpreted as numbers in WebAssign are:

-4.99
1.9435
3.25E4
1.56e-9

These entries follow the rules and can be recognized as valid numerical values.

-4.99

1.9435
3.25E4
1.56e-9

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