Precision in Measurement — Unit test Answers

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The converse of a conditional statement is "If the sum of the exterior angles of a figure is 360°, then the figure is a polygon.”What is the inverse of the original conditional statement?

A
If a figure is a polygon, then the sum of the exterior angles is 360°.
B
If the sum of the exterior angles of a figure is not 360°, then the figure is not a polygon.
C
If the sum of the exterior angles of a figure is 360°, then the figure is not a polygon.
D
If a figure is not a polygon, then the sum of the exterior angles is not 360°.
2
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Let p: The whole number has one digit.Let q: The whole number is less than 10.Which represents "The whole number has one digit if and only if the whole number is less than 10”?

A
p ∨ q
B
p ∧ q
C
p → q
D
p ↔ q
3

Let p: A shape is a triangle.Let q: A shape has four sides.Which is true if the shape is a rectangle?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
4

Which is logically equivalent to the converse of a conditional statement?

A
the original conditional statement
B
the inverse of the original conditional statement
C
the contrapositive of the original conditional statement
D
the converse of the converse statement
5

Let p: The day is Tuesday.Let q: The day is Thursday.Let r: She comes to work.Which represents the statement "The day is Tuesday or Thursday if and only if she comes to work”?

A
p ↔ (q ∧ r)
B
p ↔ (q ∨ r)
C
(p ∧ q) ↔ r
D
(p ∨ q) ↔ r
6

Four friends measure the length of a 6-millimeter-long grain of rice. They record their measurements as shown.Andrey:7 mm, 5 mm, 6 mm, 8 mmMariya:7.41 mm, 8.54 mm, 5.12 mm, 6.23 mmYuto:6.1 mm, 5.9 mm, 6.3 mm, 7.2 mmMisaki:5.843 mm, 6.981 mm, 5.334 mm, 7.632 mm

A
Andrey’s
B
Mariya’s
C
Yuto’s
D
Misaki’s
7

The truth table represents statements p, q, and r. pqr AT T T BT T F CT F T DT F F EF T T FF T F GF F T HF F F

A
r → (p ∧ q)
B
r → (p ∨ q)
C
(q ∧ r) → p
D
(q ∨ r) → p
8

What is the converse of the statement?Perpendicular lines have negative reciprocal slopes.

A
If lines have negative reciprocal slopes, then they are perpendicular.
B
If lines are perpendicular, then they have negative reciprocal slopes.
C
If lines do not have negative reciprocal slopes, then they are not perpendicular.
D
If lines are not perpendicular, then they do not have negative reciprocal slopes.
9

Wayne measured the width of a marker tip as 0.012 cm. What is the margin of error?

A
0.007 to 0.017
B
0.011 to 0.013
C
0.0115 to 0.0125
D
0.0125 to 0.0135
10

The width of a photograph is 4 inches. Tori measures its width using the two rulers, both of which measure in inches. Which statement is true about the accuracy and precision of the rulers?

Question illustration
A
The measurement found using Ruler 1 is more accurate and more precise.
B
The measurement found using Ruler 2 is more accurate and more precise.
C
The measurement found using Ruler 1 is more accurate but less precise.
D
The measurement found using Ruler 1 is more precise but less accurate.
11

Kyla measured the weight of a bunch of bananas as 1,100 grams using the scale.

Question illustration
A
1,000 g to 1,200 g
B
1,050 g to 1,150 g
C
1,150 g to 1,200 g
D
1,000 g to 2,000 g

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