The area of a projected picture on a movie screen varies directly as the square of the distance from the projector to the screen. if the distance of 20 feet produces a picture with an area of 64 square feet, what distance produces a picture with an area of 100 square feet?

the answer is c.

step-by-step explanation:

c

-by-step explanation:

it would be c

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

source:  

a.for lorena 14 hours makes $126   for 16 hours she makes 144

for julie 6 hours makes $72 for 21 hours its $252

b. julie makes more money than lorena julie makes $12 an hour and lorena makes $9  

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