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Harrizon [31]
2 years ago
10

Directions-Write an exponential function to model each situation. Then find the value of the function after the given amount of

time.
Questions-The value of a textbook is $69 and decreases at a rate of 15% per year for 11 years. and y=?
Mathematics
1 answer:
nignag [31]2 years ago
8 0

Answer:

We can now write this is a function of time in years leading to

f

(

x

)

=

200

(

.94

)

x

f

(

5

)

≈

147

Explanation:

Firs you should consider that if its exponential then it has some form similar to

3

x

. Where we have some known part (3) and the unknown part (

x

) that we are trying to find out. Mathematically we can say it has the form

a

x

. In this case we know what the

a

is and that is the entire population that was given to us. We know over time it will change but why are we even using the exponential model.

Well it turns out that if you multiply some value over and over again it has this form. Example we multiply

2

⋅

2

⋅

2

⋅

2

=

2

4

. So if something doubled over time then this is what would happen.

Now the problem is that it will continue to decrease at the same rate leading to

a

⋅

(

.94

)

because only

94

%

of the population remains each year. After two years

a

⋅

(

.94

)

⋅

(

.94

)

. We can now write this is a function of time in years leading to

f

(

x

)

=

200

⋅

(

.94

)

x

f

(

5

)

≈

147

Step-by-step explanation:

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Is y=3x+4 a function?
Oxana [17]

Answer:

Yes, it is a function

Step-by-step explanation:

Every possible input x value is paired with a unique output y value.

Another approach is to graph the function then conduct the VLT (vertical line test) at which point you will realize that any vertical line will intersect the graph at one point only meaning it is a function.

Hope this helps.

5 0
1 year ago
Generate the first 7 terms of the sequence defined by Q = 3n+ 5.​
d1i1m1o1n [39]

Answer:

8,11,14,17,20,23,26

Step-by-step explanation:

Q = 3n+ 5

an=3n+5

a1=3(1)+5=8

a2=3(2)+5=11

a(3)=3(3)+5=14

a4=3(4)+5=17

a5=3(5)+5=20

a6=23

a7=26

8 0
3 years ago
Eight is less than twice its number
Anni [7]

Answer:

2x-8

Step-by-step explanation:

From the question the meaning of the expression is

Let the number be x

2x - 8

I hope this was helpful, please mark as brainliest

3 0
3 years ago
Can someone help me with the problem -6.52+(-9)
zaharov [31]

Answer:

The answer to the problem is -15.52

3 0
3 years ago
Read 2 more answers
Which of the following phrases can be used to represent -11?
Reptile [31]

Answer:

eleven below zero

Step-by-step explanation:

opposite of -11 =11  so that doesn't work

positive eleven=11 so that doesn't work

eleven greater than zero=11 so that doesn't work

eleven below zer0= -11 so it works

3 0
3 years ago
Read 2 more answers
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