Sat难题代数1、Thestoppi
gdista
ceofacaristhe
umberoffeetthatthecartravelsafterthedriverstartsapplyi
gthebrakesThestoppi
gdista
ceofacertai
carisdirectlyproportio
altothesquareofthespeedofthecari
milesperhouratthetimethebrakesarefirstappliedIfthecar’sstoppi
gdista
cefora
i
itialspeedofmilesperhourismiles
feetwhatisitsstoppi
gdista
cefora
i
itialspeedofperhourA
swerChoices
A
feet
B
feet
C
feet
D
feet
E
feet
2、If
isdivisibleby

a
d
whichofthefollowi
gis
alsodivisiblebythese
umbersA
swerChoices
A
B
C
fD
E
Expla
atio
：1、Thecorrecta
swerisDThestoppi
gdista
ceisdirectlyproportio
altothesquareofthei
itialspeedofthecarIfreprese
tsthei
itialspeedofthecari
milesperhoura
dreprese
tsthestoppi
gdista
ceyouhavethat
thestoppi
gdista
ceisafu
ctio
of
a
dthat
wherefeetfora

isaco
sta
tSi
cethecar’sstoppi
gdista
ceis
i
itialspeedof
milesperhouryouk
owthat

Therefore
a
dthecarsstoppi
gdista
cefora

i
itialspeedof
milesperhouris
feet
2、Thecorrecta
swerisD
Si
ceasof
isdivisibleby

a
d

mustbeamultipleofa
dSomemultiples

istheleastcommo
multipleofarea
d
IfyouaddtwomultiplesofForexampleisalsoamultipleofa
d
thesumwillalsobeamultipleofa
dtheirsum
aremultiplesof
fIfyouaddamultipleof
toa
umberthatis
otamultipleofForexampleisamultiple
thesumwill
otbeamultipleofofa
dis
otTheirsum
is
otamultipleof
Thequestio
askswhicha
swerchoiceisdivisiblebythatiswhicha
swerchoiceisamultipleofchoicesarei
theformof