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ad-work [718]
3 years ago
9

Leroy uses 20 pounds of fertilizer to cover 4000 ft.² of his lawn and 50 pounds to cover 10,000 ft.². How much does he need to c

over his entire yard which has an area of 26,400 ft.²
Mathematics
1 answer:
Free_Kalibri [48]3 years ago
6 0
So 20:4000=1:200
and 50:10000=1:200
reverse
1lb:200ft^2
100ft^2=0.5lb
needs to cover 26400ft^2
100 times 264=26400 so
0.5 lb times 264=132 lb needed for entire yard
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Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

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A_t = amount of the reactant left =A_0-\frac{0.1}{100}\times A_0=0.999A_0

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Putting in the values , we get

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t_\frac{1}{2}=693 years

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