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The question is written thusly: Round 0.07284 to four, three, and two significant digits: 0.07284 (four significant digits) 0.0728 (three significant digits) 0.073 (two significant digits) THe rules are: 1) All nonzero digits are significant. 2) All zeroes between significant digits are significant....

and again, this same issue appears later in the lesson. It is written thusly: Find the product of 0.00435 and 4.6 to the appropriate number of digits. First I multiply: 0.00435 × 4.6 = 0.02001 Looking at the original numbers, I see that 4.6 has only two significant digits, so I will have to round 0....

ahh, ok. i thought the "and" was inclusive, not a requirement. Gotcha, thanks!