Which of the following functions represents exponential decay and has a y-intercept of 2?
Answers
Answer:A
Step-by-step explanation:
The exponential decay functions are y = 2(2/5)ˣ and y = 2(4/3)ˣ
What is exponential decay?An exponential function's curve is created by a pattern of data called exponential decay, which exhibits higher decreases over time.
The exponential decay function:
Aₙ = A₀(1-r)ˣ, where y = Final amount, A₀ = Initial amount, r = Rate of decay in decimal form, x = Time.
We know,
The exponential decay function:
Aₙ = A₀(1-r)ˣ, where y = Final amount, A₀ = Initial amount, r = Rate of decay in decimal form, x = Time.
And to find the y-intercept,
Substitute the value of x = 0 and solve for y.
Then y =2.
The functions are y = 2(2/5)ˣ and y = 2(4/3)ˣ
Therefore, the function are y = 2(2/5)ˣ and y = 2(4/3)ˣ.
To learn more about the exponential decay;
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Related Questions
The frequency, or pitch, of a musical note varies inversely with the wavelength. The speed of sound, 340.2 meters per second, is the constant of variation.
An “A” note in octave 5, has a frequency of 880 Hertz. What is the wavelength of the sound made by the tuner in meters?
Answers
Answer:
The wave length = 0.387 meters
Step-by-step explanation:
Remark
An inverse relationship is one of the variables is in the denominator of a fraction and the other is given on the other side of the equal sign. It sounds more complicated than it is. Here's that long sentence broken down to 3 letters.
f = k/w
Formula
f = k/w
f is the frequency
k is the speed of sound
w is the wavelength
Givens
f = 880 Hz
k = 340.2 m/s
w = ?
Solution
f = k/w
880 = 340.2/ w Multiply both sides by w
880*w = w* 340.2 /w
880*w = 340.2 Divide by 880
w = 340.2/880
w = 0.387 m
what is diameter of a circle with a circumference of 27.1 feet? Use 3.14 for pi
Answers
Answer:
85.09 feet
Step-by-step explanation:
the diameter of circle formula is
diameter = circumference × pi
= 27.1 × 3.14 = 85.09
The volume of the cylinder is 225π cm3. What is the height of the cylinder?
A. 6.25 cm
B. 25 cm
C. 37.5 cm
D. 75 cm
Answers
Answer:
25
Step-by-step explanation:
it is i promiseee
Find a polynomial equation that has zeros at x = -2,2- 3 and a double root at x = 5
A)
y=(x + 2)(x - 3)(x - 5)
B)
y = (x-2)(x * 3)(x + 5)
C)
y = (x + 2)(x - 3)(x - 5)?
D)
y = (x - 2)(x + 3)(x + 5)2
Answers
Answer:
y = (x + 2)(x - 2)(x + 3)[tex](x - 5)^{2}[/tex]
Step-by-step explanation:
y = (x + 2)(x - 2)(x + 3)([tex]x - 5)^{2}[/tex]
I don't see any of the answers given as being correct.
Easton is saving up to buy a new bicycle. He already has $15 and can save an
additional $8 per week using money from his after school job. How much total
money would Easton have after 5 weeks of saving? Also, write an expression that
represents the amount of money Easton would have saved in w weeks. HELP .
Answers
Step-by-Step:
Easton(E) has $15 bucks.
E = 5w+15
w = 8
5(8)+15 = m
m = Money
Easton has $55.
Given that x and y vary inversely and that y is 8 when x is 2, what is the constant of variation, k?
Answers
Answer:
16
Step-by-step explanation:
the equation is x = k / y
therefore k = x* y
k = 2*8
k= 16
For a party Gary buys cheese pizzas for $5 and pepperoni pizzas for $8 each. His bill comes to $75. Let x represent the number of cheese pizzas and y represent the number of pepperoni pizzas. Write an equation to represent the situation.
Answers
Answer:
The answer is the second answer from the image. Which is 5x-8y=$75
Step-by-step explanation:
It is that answer because it costs $5 for one cheese pizza and $8 for a pepperoni pizza, so the answer is 5x-8y=75
still confused?
Its that answer because the first one and the third one are the same, just both equations like in different ways like example 10+2 is 12 right? And 2 + 10 is still 12 so that means the second answer from the image is the answer.
Hope that helps.
Answer:
the answer for this question is the first choice.
Step-by-step explanation:
first, let's figure what number represents what. we know that cheese pizzas gary bought costed him $5 and pepperoni pizzas costed him $8. since x represents cheese pizzas and y represents pepperoni pizzas, 5x and 8y should be correct. this is also said in the problem which gives the correct addends. for the operation, it tells us the bill COMES to $75. since the pizzas are COMING to $75 in total, we know that this is addition.
Help and please make sure it’s right?
Answers
Answer:
-9
Step-by-step explanation:
Answer:
-10 or 4
Step-by-step explanation:
Find the value of c such that the expression is a perfect square trinomial.
x^2+12x+c
Answers
Answer:
c = 36
Step-by-step explanation:
If the coefficient of [tex]x^{2}[/tex] is one, then c = [tex](\frac{12}{2}) ^{2} = 6^{2} = 36[/tex]
PLEASE HELP ME!! ill give brainliest.
Answers
Answer:
d-7=3
Step-by-step explanation:
Answer:
3dx7
Step-by-step explanation:
I hope this helps!:) Can I get brianlest plz?
Keep up the good work!
PLEASE HELP ASAP!!!!!!! Why is it possible that globalization will have a negative effect on Africa's economy?
Answers
Answer:
This is your answer ☺️☺️☺️
Help please!!!!!!!!!!!!
Answers
Answer:
A
Step-by-step explanation:
Answer:
I believe the answer is A
Step-by-step explanation:
Since on B, Negative 2.47 is less than Negative 2.28 So thats wrong.
C is just plain wrong.
D is 3, 7.5, 7.6, .22
is this a complementary, or supplementary or neither?
Answers
Answer: Two angles are called complementary when their measures add to 90 degrees. Two angles are called supplementary when their measures add up to 180 degrees.
Jean deposits $730 in an account that pays 2.8% simple interest.
He neither adds more money nor withdraws any money from his account.
What is the total amount that will be in Jean's account after 5 years?
Answers
Answer:
125,635.6864
you have to do 2.8x730 5 times
Answer:
basically what you have to do, is multiply 2.8 by 730 5 times, because its five years
Step-by-step explanation:
The difference of two numbers is 19. Their sum is 27. Find the numbers
Answers
Answer:
23 and 4
Step-by-step explanation:
x-y=19
x+y=27
x=19+y
(19+y)+y=27
19+2y=27
2y=8
y=4
x-4=19
x=23
23+4=27
23-4=19
HELP PLEASE DUE IN 3 MINUTES
Answers
Answer:
I think it is 5.5
hopes this helps brainlesit
Step-by-step explanation:
Answer:
Step-by-step explanation:
add them all together and you get 50. divide 50 by 5 and you get 10.
The two triangles are similar. What is the value for the ? ? Round to the nearest tenth if necessary.
L 28 35° K J ? R 42 35° P 33
Answers
Answer:
KJ = 22
Step-by-step explanation:
From the given diagram, since the figure are similar we can compare their sides.
So that,
[tex]\frac{JL}{PR}[/tex] = [tex]\frac{JK}{PQ}[/tex]
Let KJ be represented by x. But;
JL = 28, PR = 42 and PQ = 33
Thus,
[tex]\frac{28}{42}[/tex] = [tex]\frac{x}{33}[/tex]
x = [tex]\frac{28*33}{42}[/tex]
= [tex]\frac{924}{42}[/tex]
= 22
x = 22
The n,
KJ = 22
Charla works at a clothing store. Her pay is calculated using the formula p = 550 +0.15t, where p is her total pay, d is the number of days
she worked, and is the amount of her total sales.
What were her total sales if her pay was $785 and she worked 5 days?
Answers
The total sales if her pay was $785, and she worked 5 days will be $1,000.
The correct equation is p = 55d + 0.15t.
What is simplification?Making anything easier to accomplish or comprehend, as well as making it less difficult, is the definition of simplification.
Charla works at a clothing store.
Her pay is calculated using the formula
p = 55d + 0.15t
where p is her total pay, d is the number of days she worked, and t is the amount of her total sales.
Then the total sales if her pay was $785, and she worked 5 days will be
785 = 55 × 5 + 0.15 t
0.15t = 510
t = $1,000
More about the simplification link is given below.
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I’m struggling hardcore and I’m an online student!! I need this done by tomorrow but I am so confused on everything
Answers
Answer:
I'm but ask a assistant
Step-by-step explanation:
ok
2х + Зу = 13
4х – у = -2
Solve the equation
Answers
Answer:
The answer to equation is ( 1/2, 4 )
Will get brainliest if correct
Answers
Answer:
there isn't a question.Ugh
A water tank fills as shown in the graph below.
What is the slope of the line?
A. 1/3
B. 2/3
C. 3/2
D. 3
Answers
what's the selling price if $42.50 was the original price and the markup is 6% with a discount of 5%
Answers
Answer:
51
Step-by-step explanation:
I did this by multiplying 42.50 by 0.06 and divide that answer with 0.05.
I need help please!
Ap calculus
Answers
9514 1404 393
Answer:
(c) 1.649
Step-by-step explanation:
For a lot of these summation problems it is worthwhile to learn to use a calculator or spreadsheet to do the arithmetic. Here, the ends of the intervals are 1 unit apart, so we only need to evaluate the function for integer values of x.
Almost any of these numerical integration methods involve some sort of weighted sum. For trapezoidal integration, the weights of all of the middle function values are 1. The weights of the first and last function values are 1/2. The weighted sum is multiplied by the interval width, which is 1 for this problem.
The area by trapezoidal integration is about 1.649 square units.
__
In the attached, we have shown the calculation both by computing the area of each trapezoid (f1 does that), and by creating the weighted sum of function values.
PLZZZZZZ HELPP MEE
TY
Answers
Answer:
i'm not sure if this all correct
Step-by-step explanation:
part A you start at 8 from the first participant then you take away one from the last one. you add up all the numbers up to get the answer. 8+7+6+5+4+3+2+1=36.
part B the first part is 1x1x1x1x1x1x1x1=1. the second part is 8x7x6x5x4x3x2x1= 40,320. the third part is 1/40320
What is 91% of 180
Show all work and round answer to the nearest tenth.
Answers
this is a picture from a question in a math class last year :>
which equation is true ?
(1.) 4/-9 = -4/9
(2.) 4/-9 = 2/-3
(3.) 4/-9 = 4/9
(4.) 4/-9 = 2/3
Answers
which describes the function on the graph-below?
Answers
Answer:
The first one
Step-by-step explanation:
what does b equal?
-15 b - 25 = -2
Answers
Answer:
b = - [tex]\frac{23}{15}[/tex]
Step-by-step explanation:
- 15b - 25 = - 2
- 15b - 25 + 25 = - 2 + 25
- 15b = 23
- 15b ÷ - 15 = 23 ÷ - 15
b = - [tex]\frac{23}{15}[/tex]
Answer
90° − 25° = 65°
9. Use the graph of each polynomial function to find the factored form of the related polynomial.
Assume the polynomial has no constant factor.
A.
What are the zeros of this function? (2 points)
what is the factorization of the polynomial
Answers
Answer:
A) the zeros are; x = -2 and x = 4
B) y = (x + 2)(x - 4)
Step-by-step explanation:
A) The zeros are the values of x where the graph curve crosses the x-axis.
Looking at the graph, the curve crosses the x-axis at x = -2 and x = 4
Thus, the zeros are; x = -2 and x = 4
B) Factorization of the polynomial means that we transform the zeros into the polynomial.
Thus, we have; y = (x + 2)(x - 4)
So when y is zero, x = - 2 or 4 as earlier derived.