I'm not sure how to do these problems..Can u plz explain and if ur a really nice person, plz answer them...if it's not too much to ask.
1) Two pipes are connected to the same tank. When working together, they can fill the tank in 8 hrs. The larger pipe, working alone, can fill the tank in 12 hrs less time tha the smaller one. How long would the smaller one take, working alone, to fill the tank?
2)Solve for the indicated letter: R=xD^2+jDf for D
D=?
3)If an object is thrown downward with an initial velocity of Vo (the o is a zero), then the distance it travels is given by s=4.9t^2+Vot. An object is thrown downward from an airplane 300m from the ground, with an intial velovity of 5m/sec. How long does it take for the object to reach the ground? (simplify ur answer. Type an integer or a decimal. Round to the nearest tenth.)
4) A record for free-fall to the ground without a parachute is 175ft. How long did the fall take? Use the formila s=16t^2.
2007-07-21
11:47:39
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7 answers
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asked by
AnimalsFan
3
in
Science & Mathematics
➔ Mathematics