1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Allushta [10]
3 years ago
11

Online jewelry sales have increased steadily over the last 10 years. In 2003, sales were approximately 2 billion dollars, and in

2010 they were approximately 14.8 billion. (i) Find the unit rate at which online jewelry sales have been increasing. (Express your answer rounded correctly to the nearest hundredth of a billion per year.) billion dollars per year (ii) Construct a model to predict online jewelery sales. According to your model, what should the online jewelery sales be in 2019? (Express your answer rounded correctly to the nearest tenth of a billion.) billion dollars
Mathematics
1 answer:
KiRa [710]3 years ago
6 0

Answer:   <em>(i)  The unit rate at which online jewelry sales have been increasing is 1.33 billion dollars per year. </em>

<em>(ii)  The online jewelry sales in 2019 will be 191.7 billion dollars.</em>

Step-by-step explanation:

In 2003, sales were approximately 2 billion dollars and in 2010, they were approximately 14.8 billion dollars.

(i)  If x is the number of years after 2003 and y is the amount of sales....

then the equation will be:   y= ab^x , where a is the initial amount and b is the growth rate.

for 2003,  x=0 and for 2010,  x=7

So, the two points in form of (x, y) will be:   (0,2) and (7,14.8)

Now plugging these two points int the above equation....

2= ab^0\\ \\ a= 2\\ \\ and\\ \\ 14.8=ab^7\\ \\ 14.8=2*b^7\\ \\ b^7=7.4\\ \\b= \sqrt[7]{7.4}=1.3309.... \approx 1.33

Thus, the online jewelry sales have been increasing at a rate of 1.33 billion dollars per year.

(ii)   As we got a=2 and b=1.33, so the equation will be now:  y= 2(1.33)^x

<u>For the year 2019, the value of</u>  x will be: (2019-2003) = 16

So plugging x=16 into the above equation, we will get.....

y=2(1.33)^16\\ \\ y=191.7150... \approx 191.7

<em>(Rounded to the nearest tenth)</em>

Thus, the online jewelry sales in 2019 will be 191.7 billion dollars.


You might be interested in
What is the solution of the equation?<br>-5=q+2​
jeyben [28]

Step-by-step explanation:

-5=q+2

-5+2=q

q= -3

hope it helps.

3 0
3 years ago
Read 2 more answers
The probability that lucy will do. The drawing is 0.125. What is the probability that she will not win
gogolik [260]

Answer:

probability is alway 1 or less than 1

therefore the probability is 0.125/1

3 0
2 years ago
Help help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
hram777 [196]

Answer:

I am pretty sure it is the 3rd one

(In geometry, an isosceles triangle is a triangle that has two sides of equal length. And i think 3 of them are an isosceles triangle)

4 0
3 years ago
Read 2 more answers
Look at points C and D on the graph: point C (-2,0), point D (2,4)
Svetach [21]
The answer to the question you are looking for is right in front of u
6 0
3 years ago
Please help!! Question is down below and I’m kinda confused
Arada [10]
It would be the last one
4 0
3 years ago
Other questions:
  • Hi! How do you solve this? Step by step??
    5·2 answers
  • I need help in this question can anyone help me please. A pattern has 4 blue triangles to every 12 yellow triangles. If you were
    6·1 answer
  • 1/2(4x-2)-2/3(6x+9&lt;4
    13·1 answer
  • Which factoring method would be best to factor 17x^2 + 34x + 51
    11·1 answer
  • What is the distance from -12 to -5<br><br><br><br><br> 5<br><br><br><br> 7<br><br><br><br> 17
    14·2 answers
  • Ally and Christian bought 4 pounds of mulch and 2 pounds of seed for the garden how many ounces of these products did they purch
    5·2 answers
  • Explain why P(A|D) and P(D|A) from the table below are not equal.
    10·2 answers
  • -8 x+3=-29 what is x?
    8·1 answer
  • 5 pleaseeee help me out ill mark you brainlist<br> I'm on the verge of failing smh
    13·1 answer
  • 9:00 oclock as a fraction in its lowest form​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!