Question

The number of internet users worldwide (in millions) x years after 1994 is given by y = 5.4922(1.3786)^x .

(a) Estimate the number of internet users in 2020. (Include units in your answer.)

(b) In which year will the yield be 14.7 million users?

Answer #1

The growth in the number (in millions) of Internet users in a
certain country between 1990 and 2015 can be approximated by a
logistic function with k=0.0015 where t is the number of years
since 1990. In 1990 (when t=0),the number of users was about 2
million, and the number is expected to level out around 220
million.
(a) Find the growth function G(t) for the number of Internet
users in the country.
Estimate the number of Internet users in...

The number of adult
Internet users who take photos or videos they have found online and
post them on social media continues to increase. Looking at only
adult Internet users, aged 18 and over, about 15% are 18-29 years
old, another 26% are 30-49 years old, and the remaining 59% are 50
and over. The Pew Internet and American Life Project finds that 68%
of Internet users aged 18-29 have posted photos or videos they have
found online, along with...

12. In order to estimate the mean amount of time computer users
spend on the internet each month, how many computer users must be
surveyed in order to be 90% confident that your sample mean is
within 15 minutes of the population mean? Assume that the standard
deviation of the population of monthly time spent on the internet
is 211 min. What is a major obstacle to getting a good estimate of
the population mean? Use technology to find the...

The number of asthma sufferers in the world was about 83 million
in 1990 and has been increasing over the years at an approximate
rate of 7% per year. Let N represent the number of asthma
sufferers, in millions, worldwide t years after 1990.
a) what is the yearly growth or decay factor. (answer complete
sentence)
b) write an exponential model to represent the number of asthma
sufferers worldwide, N(t), in millions, as a function of t years
since 1990....

The number of a particular fish in thousands x years after 1972
can be modeled by f(x)= x237(0.882)x. Estimate the year when the
number of these fish reached 98 thousand.

Let x be the age of a licensed driver in years. Let
y be the percentage of all fatal accidents (for a given
age) due to failure to yield the right of way. For example, the
first data pair states that 5% of all fatal accidents of
37-year-olds are due to failure to yield the right of way.
x
37
47
57
67
77
87
y
5
8
10
15
31
44
Complete parts (a) through (e), given Σx =...

Let x be the age of a licensed driver in years. Let
y be the percentage of all fatal accidents (for a given
age) due to failure to yield the right of way. For example, the
first data pair states that 5% of all fatal accidents of
37-year-olds are due to failure to yield the right of way.
x
37
47
57
67
77
87
y
5
8
10
14
33
46
Complete parts (a) through (e), given Σx =...

Let x be the age of a licensed driver in years. Let
y be the percentage of all fatal accidents (for a given
age) due to failure to yield the right of way. For example, the
first data pair states that 5% of all fatal accidents of
37-year-olds are due to failure to yield the right of way.
x
37
47
57
67
77
87
y
5
8
10
14
33
44
Complete parts (a) through (e), given Σx =...

Let x be the age of a licensed driver in years. Let
y be the percentage of all fatal accidents (for a given
age) due to failure to yield the right of way. For example, the
first data pair states that 5% of all fatal accidents of
37-year-olds are due to failure to yield the right of way.
x
37
47
57
67
77
87
y
5
8
10
16
32
42
Complete parts (a) through (e), given Σx =...

Let x be the age of a licensed driver in years. Let
y be the percentage of all fatal accidents (for a given
age) due to failure to yield the right of way. For example, the
first data pair states that 5% of all fatal accidents of
37-year-olds are due to failure to yield the right of way.
x
37
47
57
67
77
87
y
5
8
10
14
27
45
Complete parts (a) through (e), given Σx =...

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