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1. Answer:

   I think this is right, if not let me know and i will try to find my mistake. The redwood would be 0.20 and the stainless steel would be 0.030.

   Step-by-step explanation:

   To change a number from scientific notation to standard form, move the decimal point to the left if the exponent is negative. However if the exponent were to be positive, you would move it to the right. You move to the left (in this case) by 2 for the redwood. For the stainless steel you would do the same thing but the exponent is -3, so you would move the decimal to the left by 3.

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2. The difference between the density of these is 0.02 and 0.03 is 0.017 and in standard form that is 1.7 x 10^-2

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