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Choices B, C, and D are incorrect and could arise from errors in
rewriting
D
t
)RUH[DPSOHFKRLFH%FRXOGUHVXOWLI
is
added to the left side of
D
t
and subtracted from the
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QUESTION 10
Choice B is correct.
The air temperature at
which the speed of a sound
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IRU
D
and then
solving for
t
in the given formula. Substituting
IRU
D
in
the equation
D
t
JLYHV
t
.
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t
DQGWKHQGLYLGLQJERWKVLGHVRIWKHHTXDWLRQE\\LHOGV
t
=
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Choices A, C, and D are incorrect and might arise from errors made when
VXEVWLWXWLQJIRU
D
or solving for
t
in the equation
D
t
or in rounding the result to the nearest integer. For example, choice C
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QUESTION 11
Choice A is correct.
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[DQGDGGLQJWRERWKVLGHVRI
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[ơJLYHVơƪ
[
. Therefore,
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[ơƪ
[ơ
if and only if
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[LV127DVROXWLRQWR
[ơƪ
[ơLIDQGRQO\LI
[LVJUHDWHUWKDQơ2IWKHFKRLFHVJLYHQ
RQO\ơLVJUHDWHUWKDQơDQGWKHUHIRUHFDQQRWEHDYDOXHRI
[
.
Choices B, C, and D are incorrect because each is a value of
[
that is less
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QUESTION 12
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