Math
N is increased by 2n,the sum is 5more than 4n
Math
15 decreased by twice n equals 13
math
1.79
physics
please give a me a nice topic for my investigatory project. hope the materials also are easy to gather. thanks alot
physics
an object falls from a plane flying horizontally at an altitude of 40,000 ft at 500 mi/h. How long will it take to hit the ground?
Finance
45036
Math
A 30 year fixed rate $100,000 mortgage loan . The interest rate is 7.5% compounded monthly.After 20 years the bank is making an offer to refinance at a lower rate of 4.5% . The estimated closing costs are $3,000?
algebra
The horsepower (hp) that a shaft can safety transmit varies jointly with its speed (in revolutions per minute, or rpm) and the cube of the diameter. If a shaft of a certain material 2 in in diameter can transmit 36 hp at 75 rpm, what diameter must the shaft have in order to tr...
algebra
A motorboat can maintain a constant speed of 24 mph relative to the water. The boat makes a trip upstream to a certain point in 62 minutes. the return trip takes 34 minutes. What is the speed of the current?
differential calculus
a right circular cylinder has a fixed height of 6 units. Find the ratio of change of its volume(v) with respect to the radius(r) of its base.
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