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Eddi Din [679]
3 years ago
6

easiest problem ever for 20 stars opls help ????? Karen's dad's car, moving at a constant speed, covers 75 meters in 5 seconds.

What is the car’s speed in km/hr? (1 km = 1000m)
Mathematics
1 answer:
JulsSmile [24]3 years ago
3 0
The answer is 54 km/hr
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Write two forms of 6.7
alex41 [277]
Word form : six point seven 
5 0
3 years ago
Suppose a student carrying a flu virus returns to an isolated college campus of 2000 students. Determine a differential equation
ad-work [718]

Answer:

x(t) = 2000 - e^(-k*t)

Step-by-step explanation:

Interpretation:

No . infected student = x

Total student = 2000

rate of infected students = dx / dt

not-infected student = 200 - x

The general rate at which student are infected can be expressed as below:

dx / dt = k * ( 2000 - x )

To develop an expression of x(t) we integrate the above expression by separating variables:

dx / (2000 - x ) = k * dt

Now integrate:

\int\limits{\frac{1}{(2000-x)} } \, dx = k *  \int\limits{dt}\\\\- ln (2000-x) = k*t + C\\\\

@ t = 0 , infected students x = 0

Hence,

C = - ln (2000)

- ln (2000-x) = k*t + - ln (2000)\\\\ln (\frac{2000-x}{2000}) = -k*t\\\\ 2000 - x = e^(-kt)\\\\x(t) = 2000 - e ^ (-k*t)

6 0
3 years ago
What does y equal according to this
saul85 [17]
It represents -2,but it's not exactly proven to be right
8 0
3 years ago
Please help me. Thank u.
timurjin [86]

Answer:

n=10

p=0.5

k=5

Step-by-step explanation:

n represents = number of trials

p represents = probability of success

k represents = number of successes

8 0
3 years ago
I need help finding the solutions​
maks197457 [2]
I believe that x = 2 and y = -2
4 0
3 years ago
Read 2 more answers
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