Mathematics, 17.06.2020 07:57 Aaron5795
Dennis let go of a penny at the top of a well, and the penny fell straight down to the bottom of the well. The top of the well was 1\dfrac{1}{2}1
2
1
1, start fraction, 1, divided by, 2, end fraction meters above ground. The bottom of the well was 111111 meters below ground.
The following equation describes this situation.
\quad 1\dfrac{1}{2} + \left(-12 \dfrac{1}{2} \right) = -111
2
1
+(−12
2
1
)=−111, start fraction, 1, divided by, 2, end fraction, plus, left parenthesis, minus, 12, start fraction, 1, divided by, 2, end fraction, right parenthesis, equals, minus, 11
What does -12\dfrac{1}{2}−12
2
1
minus, 12, start fraction, 1, divided by, 2, end fraction tell us?
Choose 1
Choose 1
(Choice A)
A
The distance between ground level and the bottom of the well is 12\dfrac1212
2
1
12, start fraction, 1, divided by, 2, end fraction meters.
(Choice B)
B
The distance between the top of the well and the bottom of the well was 12\dfrac{1}{2}12
2
1
12, start fraction, 1, divided by, 2, end fraction meters.
(Choice C, Checked)
C
None of the above
Answers: 2
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