physics
Suppose the roller coaster in Fig. 6-41 (h1 = 38 m, h2 = 11 m, h3 = 25) passes point 1 with a speed of 1.60 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it reach point 2? The distance traveled is 45.0 m.
precalc/trig
olve for the interval [0, 2pi]. cos(x+ pi/4)+cos(x- pi/4)=1
algebra
A store manager bought c calculators for $8. All but four were sold for $10 each. The remaining four calculators were not sold. Find the store's profit, in simplified form, in term of c.
Algebra
I solved the problem like that: Sara: 2x Miguel: x 2x+6 =4/3x 18/3 =4/3 -6/3x 6 = -2/3x x = - 9 so Miguel = -9 Sara = -18 Is it correct?
Algebra
Sara has twice as much money as Miguel. If she had $6 more. She would have 4/3 as much money as he has. How much money does each have now?
Physics
E
Physics
An 80 kg man climbs a 50 m-high hill in 20 minutes. What is the average power in watts he expends climbing the hill?
Math
A pizza shop tried 45 new type pizza during the past year and 20% percent of them became popular. Which best represents the fraction of pizzas that did not become popular?
Math
A pizza shop tried 45 new type pizza during the past year and 20% percent of them became popular. Which best represents the fraction of pizzas that did not become popular?
Physics
The diagram below shows a large cube of mass 25 kg being accelerated across a frictionless level floor by a horizontal force, F. A small cube of mass 4.0 kg is in contact with the front surface of the cube. The coefficient of static friction between the cubes is 0.71. What is ...
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