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Burka [1]
4 years ago
13

A khanacademy.org Differential equations: exponential model word problems You might need: Calculator A controversial story comes

out in the school newspaper. The number of students who have not heard about the story decreases at a rate that is proportional at any time to the number of students who have not heard the story at that time. There were 900 students who had not heard the story initially, and the number of students is divided by 3 every 4 days. How many students have not heard the story after 7 days? Round to the nearest student. students Stuck?
Mathematics
1 answer:
malfutka [58]4 years ago
4 0
The answer for this question is to be polite to people and he kind to the students .
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What can you say about the y-values of the two functions <img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%203%5Ex-3" id="TexForm
slavikrds [6]

Answer:

a) The minimum y-value of f(x) is -3

d) The minimum y-value of g(x) is -3

Step-by-step explanation:

Given in the question that,

f(x) = 3^{x}-3

g(x) = 7x² - 3

<h3>A)</h3>

At large negative exponents, the value approaches to zero

y = 3^{-100}-3=-3

y = 3^{-1000}-3=-3

y = 3^{-10000}-3=-3

<h3>B)</h3>

Minimum y-value of g(x) will be when x = 0

y = 7x² - 3

y = 7(0) - 3

y = -3

4 0
3 years ago
-5/6 - 17/18 - (-2/9)
Sunny_sXe [5.5K]

First, let's fine the decimal of each fraction.


-5 Divided By 6 = -0.83333333333

17 Divided By 18 = 0.94444444444

-2 Divided By 9 = -0.22222222222



-5/6 - 17/18 - (-2/9) = -1.55555555556


8 0
4 years ago
HELP!!!!!!!!What is the equation, in slope-intercept form, of the line that passes through (0, −2) and has a slope of −3?
emmainna [20.7K]

Answer:

y= -3x -2

Step-by-step explanation:

(0 , -2) and a slope of -3

The -2 is the y-intercept, put the initial point there

Use that point and put the -3 slope


3 0
4 years ago
A metal company's old machine makes bolts at a constant rate of 100 bolts per hour.The company's new machine makes bolts at a co
zloy xaker [14]

Answer:72minutes B

Step-by-step explanation:

100t + 150t =300

250t =300

t=300/250

t=6/5 hours

Converting to minutes

6/5×60=72 minutes

7 0
3 years ago
Read 2 more answers
The sum of mary's age and her mother's age is 36. mary's mom is 5 times older than mary. how old is each person
grandymaker [24]

mary + mom = 36

mom = 5x mary


mary + 5mary = 36

 6 mary = 36

mary = 36/6 =6

 mary is 6 years old

 her mother is 5 x 6 = 30 years old

5 0
3 years ago
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