exam Maths Puzzle Numerical Ability

a passenger train can travel 325 mi the same time a freight train takes to travel 200 mi. if the speed of the passenger train is 25 mi/h faster than the speed of the freight train

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exam Other Question

Social science. If there are 6 x 10(9th power) people on the Earth and there is enough freshwater
to provide each person with 8.79 x 10(5th power) L, how much freshwater is on the
Earth?

thanks
Cubics using P(x) = af(b(x-c))+d

Choosing b

Please rewrite C(X) for b. Let a = 1, d = 0, and C = 0

Please make 3 copies of the same function on your calculator. Let b = -1