Please Help! Biology Lab Homework!?

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can someone please help me convert theses????

240,000 ng = ______mg = ______g

50 cm = ______m = _______m
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1. A nanogram is one billionth of a gram or 1x 10 ^(-9) and milligrams are one millionth (10^(-3)) so here goes:
0 10^(-1) 10^(-2) 10^(-3) 10^(-4) 10^(-5) 10^(-6) 10^(-7) 10^(-8) 10^(-9)
g dg cm mg - - microgram - - ng

Each space is a decimal point. Let's count: from ng to mg, 1, 2, 3, 4, 5, 6. Or 9 - 3 = 6. So move your decimal 6 spaces. Now move another 3 spaces for grams.
240,000 ng = 0.24mg = 0.00024g

2. I'm assuming you want micro(a "u" with a tail) meters for the middle one. Four spaces between cm to micrometer. 9 spaces from micro to kilo, or more easily 3 from cm.
km hm Dm m dm cm mm - - micrometer
50 cm = 500,000 micrometers = 0.05km

Source:

http://wps.prenhall.com/wps/media/objects/165/169061/GIFS/table1.5.gif
And paying attention in science class.

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  • Kimberly answered 7 months ago
    10 to the -9 power is nano and 10 to the -3 is milli (mg). There is 6 powers difference between these two so you will move your decimal over 6 times. Since -9 is smaller than -3, you will move your decimal over to the right. Remember...10 to the -9 power is .000000001 and 10 to the -3 power is .001.
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  • ? answered 5 years ago
    There are (one million) 1,000,000ng in 1mg...1 milligram = 0.001 grams...1 centimeter = 0.01 meters...u do the math...or go on google
    : D

    Source(s):

    google.com
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