Learning. An average student enrolled in an advanced typing class progressed at a rate of N ′ ( t ) = 6 e −0.1 t words per minute per week t weeks after enrolling in a 15-week course. If, at the beginning of the course, a student could type 40 words per minute, how many words per minute N ( t )would the student be expected to type t weeks into the course? After completing the course?
Learning. An average student enrolled in an advanced typing class progressed at a rate of N ′ ( t ) = 6 e −0.1 t words per minute per week t weeks after enrolling in a 15-week course. If, at the beginning of the course, a student could type 40 words per minute, how many words per minute N ( t )would the student be expected to type t weeks into the course? After completing the course?
Solution Summary: The author calculates the number of words per minute N(t) that the student can type in t weeks and after completing the course.
Learning. An average student enrolled in an advanced typing class progressed at a rate of N′ (t) = 6e−0.1t words per minute per week t weeks after enrolling in a 15-week course. If, at the beginning of the course, a student could type 40 words per minute, how many words per minute N(t)would the student be expected to type t weeks into the course? After completing the course?
T. Determine the least common
denominator and the domain for the
2x-3
10
problem:
+
x²+6x+8
x²+x-12
3
2x
2. Add:
+
Simplify and
5x+10 x²-2x-8
state the domain.
7
3. Add/Subtract:
x+2 1
+
x+6
2x+2 4
Simplify and state the domain.
x+1
4
4. Subtract:
-
Simplify
3x-3
x²-3x+2
and state the domain.
1
15
3x-5
5. Add/Subtract:
+
2
2x-14
x²-7x
Simplify and state the domain.
Q.1) Classify the following statements as a true or false statements:
Q
a. A simple ring R is simple as a right R-module.
b. Every ideal of ZZ is small ideal.
very den to is lovaginz
c. A nontrivial direct summand of a module cannot be large or small submodule.
d. The sum of a finite family of small submodules of a module M is small in M.
e. The direct product of a finite family of projective modules is projective
f. The sum of a finite family of large submodules of a module M is large in M.
g. Zz contains no minimal submodules.
h. Qz has no minimal and no maximal submodules.
i. Every divisible Z-module is injective.
j. Every projective module is a free module.
a homomorp
cements
Q.4) Give an example and explain your claim in each case:
a) A module M which has a largest proper submodule, is directly indecomposable.
b) A free subset of a module.
c) A finite free module.
d) A module contains no a direct summand.
e) A short split exact sequence of modules.
Chapter 5 Solutions
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Elementary Statistics ( 3rd International Edition ) Isbn:9781260092561
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