The majority of American adults use their smartphones to go online. The bar graph shows the percentage of American using phones to go online from 2009 through 2013. Source: Pew Internet and American Life Project The data in the graph can be modeled by the formula S = 32 + 8.7 x − 0.3 x 2 , where S represents the percentage of American adults using smartphones to go online x years after 2009. Use this formula to solve Exercises 93 –94 . According to the formula, what percentage of American adults used smartphones to go online in 2013? Does this underestimate or overestimate the actual percent shown by the bar graph? By how much? The formula C = 5 9 ( F − 32 )
The majority of American adults use their smartphones to go online. The bar graph shows the percentage of American using phones to go online from 2009 through 2013. Source: Pew Internet and American Life Project The data in the graph can be modeled by the formula S = 32 + 8.7 x − 0.3 x 2 , where S represents the percentage of American adults using smartphones to go online x years after 2009. Use this formula to solve Exercises 93 –94 . According to the formula, what percentage of American adults used smartphones to go online in 2013? Does this underestimate or overestimate the actual percent shown by the bar graph? By how much? The formula C = 5 9 ( F − 32 )
Solution Summary: The author calculates the percentage of American adults who used smart phones to go online in 2012 according to the formula.
The majority of American adults use their smartphones to go online. The bar graph shows the percentage of American using phones to go online from 2009 through 2013.
Source: Pew Internet and American Life Project
The data in the graph can be modeled by the formula
S
=
32
+
8.7
x
−
0.3
x
2
,
where S represents the percentage of American adults using smartphones to go online x years after 2009. Use this formula to solveExercises 93 –94.
According to the formula, what percentage of American adults used smartphones to go online in 2013? Does this underestimate or overestimate the actual percent shown by the bar graph? By how much?
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Unit Test
Unit Test Review Active
1
2
3
4
Which statement is true about the graph of the equation y = csc¯¹(x)?
There is a horizontal asymptote at y = 0.
उद
There is a horizontal asymptote at y = 2.
There is a vertical asymptote at x = 0.
O There is a vertical asymptote at x=-
R
Mark this and return
C
Save and Exit
emi
ے ملزمة احمد
Q (a) Let f be a linear map from a space X into a space Y and (X1,X2,...,xn) basis for X, show that fis one-to-
one iff (f(x1),f(x2),...,f(x) } linearly independent.
(b) Let X= {ao+ax₁+a2x2+...+anxn, a;ER} be a vector space over R, write with prove a hyperspace and a
hyperplane of X.
مبر خد احمد
Q₂ (a) Let M be a subspace of a vector space X, and A= {fex/ f(x)=0, x E M ), show that whether A is
convex set or not, affine set or not.
Write with prove an
application of Hahn-Banach theorem.
Show that every singleton set in a normed space X is closed and any finite set in X is closed (14M)
Let M be a proper subspace of a finite dimension vector space X over a field F show that
whether: (1) If S is a base for M then S base for X or not, (2) If T base for X then base for M
or not.
(b) Let X-P₂(x) be a vector space over polynomials a field of real numbers R, write with L
prove convex subset of X and hyperspace of X.
Q₂/ (a) Let X-R³ be a vector space over a over a field of real numbers R and
A=((a,b,o), a,bE R), A is a subspace of X, let g be a function from A into R such that
gla,b,o)-a, gEA, find fe X such that g(t)=f(t), tEA.
(b) Let M be a non-empty subset of a space X, show that M is a hyperplane of X iff there
Xiff there
exists fE X/10) and tE F such that M=(xE X/ f(x)=t).
(c) Show that the relation equivalent is an equivalence relation on set of norms on a space
X.
Chapter 1 Solutions
Intermediate Algebra for College Students (7th Edition)
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