Robert knows from reading his syllabus in intermediate algebra that the average of his chapter tests accounts for 60 % ( 0.6 ) of his overall course grade. He also knows that the final exam counts as 40 % ( 0.4 ) of his grade. Suppose that the average of Robert’s chapter tests is 89 % . a. Determine the range of grades that he would need on his final exam to get an “ A” in the class. (Assume that a grade of“A” is obtained if Robert’s overall average is 90 % or better.) b. Determine the range of grades that Robert would need on his final exam to get a “B” in the class. (Assume that a grade of “ B” is obtained if Robert’s overall average is at least 80 % but less than 90%.)
Robert knows from reading his syllabus in intermediate algebra that the average of his chapter tests accounts for 60 % ( 0.6 ) of his overall course grade. He also knows that the final exam counts as 40 % ( 0.4 ) of his grade. Suppose that the average of Robert’s chapter tests is 89 % . a. Determine the range of grades that he would need on his final exam to get an “ A” in the class. (Assume that a grade of“A” is obtained if Robert’s overall average is 90 % or better.) b. Determine the range of grades that Robert would need on his final exam to get a “B” in the class. (Assume that a grade of “ B” is obtained if Robert’s overall average is at least 80 % but less than 90%.)
Solution Summary: The author calculates the range of marks that Robert needs to score in his final exam to get an A grade.
Robert knows from reading his syllabus in intermediate algebra that the average of his chapter tests accounts for
60
%
(
0.6
)
of his overall course grade. He also knows that the final exam counts as
40
%
(
0.4
)
of his grade. Suppose that the average of Robert’s chapter tests is
89
%
.
a. Determine the range of grades that he would need on his final exam to get an “ A” in the class. (Assume that a grade of“A” is obtained if Robert’s overall average is
90
%
or better.)
b. Determine the range of grades that Robert would need on his final exam to get a “B” in the class. (Assume that a grade of “ B” is obtained if Robert’s overall average is at least
80
%
but less than 90%.)
Listen
A falling object travels a distance given by the formula d = 6t + 9t2 where d is in feet
and t is the time in seconds. How many seconds will it take for the object to travel
112 feet? Round answer to 2 decimal places. (Write the number, not the units).
Your Answer:
Solve by the quadratic formula or completing the square to obtain exact solutions.
2
e
104
OA) -16±3√6
B) 8±√10
O c) -8±√10
OD) 8±3√√6
U
Question 14 (1 point)
Listen
The frame on a picture is 18 in by 22 in outside and is of uniform width. Using
algebraic methods, what is the width of the frame if the inner area of the picture
shown is 250 in²2? Write answer to 2 decimal places. (Write the number with no
units).
18 in
Your Answer:
22 in
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