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Leya [2.2K]
3 years ago
14

The altitude a (in feet) of a plane t minutes after liftoff is given by a=3,400t +600 . How many minutes after liftoff is the pl

ane at an altitude of 21,000 feet?
Mathematics
1 answer:
grin007 [14]3 years ago
3 0

Answer:

6 minutes

Step-by-step explanation:

a=3400t+600 substitute 21000 for a

21000=3400t+600 subtract 600 from both sides

20400=3400t divide by 3400

6=t

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Step-by-step explanation:

A) In order to calculate the interest , we can use the following formula :

P=P_{0}.(1+i)^{t}

Where P is the interest , P0 is the initial value, i is the interest and t is the time.

So , using P0 =600,i= 0.0005768 and t=27 ,we have :

P=600.(1+0.0005768)^{27} \\P=600.(1.01569)\\P=609.41

Calculating only the interest, we have :

I=609.41-600\\I=9.41\\

So the interest is $9.41.

B) He paid the final value calculated above, that is , $609.41.

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