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Mazyrski [523]
3 years ago
6

Can y’all help me out with this

Mathematics
1 answer:
labwork [276]3 years ago
5 0
(a)  P= \frac{A}{e^{rt}} 

(b) e^{rt}= \frac{A}{P} 

ln e^{rt}= ln(\frac{A}{P}),  
rt=  ln(\frac{A}{P}),   t= \frac{ ln(\frac{A}{P})}{r}, or,   t= \frac{ lnA - lnP}{r},

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Answer:

C. The electric car is not moving at 0 seconds and 12 seconds.

Step-by-step explanation:

Given:

The table given is:

x   0   2    4     6      8      10      12  

y   0   45  72   81    72     45     0

From the above table, we observe that the car starts from rest and its speed increases from 0 to 6 seconds, the maximum speed being 81 mph.

After 6 seconds, the speed of the car goes on decreasing till it stops at time equal to 12 seconds.

So, the speed of the car at the start when x=0 is 0 mph as it is at rest at that time.

Also, when the time is x=12\ s, the car has come to a stop and thus its speed has reduced to 0 mph again. So, the car is not moving after 12 seconds.

From the above conclusion, we can say that only option C is correct.

The electric car is not moving at 0 seconds and 12 seconds.

3 0
3 years ago
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Gennadij [26K]
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3 years ago
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Nataly [62]

Answer:

see explanation

Step-by-step explanation:

Given

2x² + 7x = 15 ( subtract 15 from both sides )

2x² + 7x - 15 = 0 ← in standard form

To factorise the left side

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The factors are + 10 and - 3

Use these factors to split the x- term

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3 years ago
Which expression is equivalent to 2.3 × 2.3 × 2.3 × 2.3 × 2.3?
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An expression that is equivalent to 2.3 x 2.3 x 2.3 x 2.3 x 2.3 is 2.3^

5 0
4 years ago
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HELP ME WITH THIS SET OF QUESTIONS!!
ANTONII [103]

<span>1. Y = 94x-39/4</span>

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