How many square feet of outdoor carpet will we need for this hole? 2 more questions

answer:

48 ft squared.

Step-by-step explanation:

Subtract the empty areas.

Triangle : 3 X 4/2

Rectangle: 2 X 3

Together they equal 12.

Without them, the hole would equal 60 ft squared.

Now, subtract 12 from 60.

You get 48.

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

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