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Mathematics 23 Online
OpenStudy (anonymous):

Meteorologist Paul Windward and geologist Rhaina Stone are rushing to a paleontology conference in Pecos Gulch.Paul lifts off in his balloon at noon from Lost Wages, heading east for Pecos Gulch Conference Center. With the wind blowing west to east, he averages a land speed of 30km/h. This will allow him to arrive in 4 hrs, just as the conference begins.Meanwhile, Rhaina is 160 km north of Lost Wages. At the moment of Paul's liftoff, Rhaina hops into an off road vehicle and heads directly for the conference center. At what average speed must she travel to arrive at the same time Paul does?

OpenStudy (anonymous):

@jim_thompson5910 i know its long..sorry.. i need help..

jimthompson5910 (jim_thompson5910):

|dw:1405484770767:dw|

jimthompson5910 (jim_thompson5910):

First off, what is this distance here? |dw:1405484855475:dw|

OpenStudy (anonymous):

doesnt say..

jimthompson5910 (jim_thompson5910):

hint: it takes him 4 hrs to travel that distance and he's traveling 30 km/hr

OpenStudy (anonymous):

do i have to do an equation with it??

jimthompson5910 (jim_thompson5910):

distance = rate * time

jimthompson5910 (jim_thompson5910):

rate is another term for speed

OpenStudy (anonymous):

so..its d=30km/hr*4

jimthompson5910 (jim_thompson5910):

forget about the units for a second

jimthompson5910 (jim_thompson5910):

they're kinda cluttering things up

OpenStudy (anonymous):

ok..

jimthompson5910 (jim_thompson5910):

what's the distance from Paul to the Destination?

OpenStudy (anonymous):

80..

jimthompson5910 (jim_thompson5910):

no

jimthompson5910 (jim_thompson5910):

distance = rate * time don't worry about the units

OpenStudy (anonymous):

i really have no clue what to do..

jimthompson5910 (jim_thompson5910):

"With the wind blowing west to east, he averages a land speed of 30km/h. This will allow him to arrive in 4 hrs,"

jimthompson5910 (jim_thompson5910):

That's given to you

OpenStudy (anonymous):

so.. i have to multiply the rate which is the speed times the 4 hrs he is going to take.. to then get the distance??

jimthompson5910 (jim_thompson5910):

correct

OpenStudy (anonymous):

120..is that correct?

jimthompson5910 (jim_thompson5910):

yep |dw:1405485594795:dw|

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