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ahrayia [7]
3 years ago
10

Madison is writing a report on the human body for science class. She wants to use numbers in exponent form for her report. She i

s having trouble deciding which format would be best for the diameter of a red blood cell: 7.5 x 104 mm or 7.5 x 10-4 mm. Help Madison decide which one to use. Compare and contrast these numbers to justify your choice. Be sure to include an explanation of the meaning of the negative exponent and the standard form for both of these numbers.
Mathematics
1 answer:
kkurt [141]3 years ago
3 0
75 x 104 . . . ..........................
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What is 25% Of 30% Of 400?
marta [7]

Answer:

25% of 30% of 400 = 30

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Step-by-step explanation:

You can either get 30% of 400 first then 25% of 400 or you can get the total percentage of 400.

Method 1:

30% of 400 = 0.3 of 400 = 0.3 * 400 = 120

25% of 120 = .25 of 120 = .25 * 120 = 30

Method 2:

30% of 25% = 0.3 * 0.25 = 0.075 = 7.5% of 400

7.5% of 400 = 0.075 of 400 = 0.075 * 400 = 30

5.) To find the percentage  of the new price, you can build the equation below.

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The percentage decrease in price is then 100% of the original price - 66.667% of the original price = 100% - 66.67% = 33.33% = 33% decrease.

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Answer:

Step-by-step explanation:

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3 years ago
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