AnswersNC-Math 4Cumulative Exam

Cumulative Exam — Cumulative exam Answers

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A circular crop field has an irrigation system in which a pipe, with one end attached to a tower at the center of the field, turns continuously to deliver water. The horizontal distance, in meters, from the tip of the pipe to the farmhouse is represented by y = , where x represents time in hours.

Question illustration
A
the length of the pipe
B
the distance between the tower and the farmhouse
C
the time it takes for the pipe to complete one full circle
D
the difference between the maximum and minimum distances from the tip of the pipe to the farmhouse
22
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Ines created a coefficient matrix to represent the system of linear equations below.Which type of matrix did Ines create?

Question illustration
A
a matrix
Option A
B
a matrix
Option B
C
an augmented matrix
D
a diagonal matrix
23

A college professor hypothesizes that readers will comprehend more when reading a graphic novel than when reading text with no illustrations. To conduct an experiment, the professor will assign some students to the control group with a reading assignment in paragraph form and other students to the treatment group with a reading assignment in graphic novel form. Afterwards, all the students will take a quiz about the reading.

A
that both groups are made up of students from the same class.
B
that the treatment group has more students to better test the hypothesis.
C
that each student does not know about the alternative version of the assignment.
D
that both groups are roughly equivalent with regards to students’ gender, reading ability, and study habits.
24

Which expression is equivalent to (3 + 5i)2?

A
–16 + 30i
B
6 + 34i
C
–16 – 34i
D
16 + 30i
25

What is one possible solution for the triangle below?

Question illustration
A
Y Z similar to 43 point 0, m angle X similar to 94 point 6 degree, m angle Z similar to 17 point 4 degree.
Option A
B
Y Z similar to 19 point 3, m angle X similar to 85 point 4 degree, m angle Z similar to 26 point 6 degree.
Option B
C
Y Z similar to 12 point 9, m angle X similar to 17 point 4 degree, m angle Z similar to 94 point 6 degree.
Option C
D
Y Z similar to 95 point 4, m angle X similar to 26 point 7 degree, m angle Z similar to 85 point 4 degree.
Option D

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