Math
Ann had $198 more than her sister. After their mother gave Ann $20 and her sister $60, Ann had twice as much money as her sister. How much money did Ann have at first.
math
a helicopter blade spins 775 times in 3 minutes. find the rate of the revolutions per second.
Chemistry
How much heat energy, in kilojoules, is required to convert 36.0g of ice at 18.0C to water at 25.0C
Physics
Thanks!! Clears up everything
Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States ...
Math
Two roads intersect at right angles. A water spring is located 65 m from one road and 55 m from the other road. A straight path is to be laid out to pass the spring from one road to the other. Find the least area that can be bounded by the roads and the path. area in m2 = can ...
Math
ok.... so is next step take the first derv of the area Area of rect '= -1/2(4-b^2) + (4-2^2)^1/2
Math
Would it be safe to say that the the diagonal line in the rectangle could equal r = 2. so I could use b^2+ h^2 =r^2 solve for h h= Square root ( r^2 -b^2) Area = b^2 * Square root (r^2-b^2) area = b*(r^2-b^2)^1/2 ....... ????
Math
A mechanical engineering student wishes to inscribe a rectangle in a quarter circle of radius 2.00 cm. Determine the dimensions of the rectangle that will give it the greatest area. length in cm = height in cm = My attempt on find the relationship between the rectangle and the...
Math
Thanks Steve.
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