Write the formula using the "language" of variation. f = mv2/r, where f is the centripetal force of an object of mass m moving along a circle of radius r at velocity v
What will be an ideal response?
The centripetal force of an object varies directly as its mass and the square of its velocity and inversely as the radius of the circle it moves along.
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Solve the problem.Find the half-life of the radioactive element radium, assuming that its decay constant is 
with time measured in years.
A. 2308 years B. 1600 years C. 800 years D. 1400 years
Solve the system by the Gauss-Jordan method.
?
What will be an ideal response?
Multiply.(5x + 3)(4x + 3)
A. 9x2 + 6 B. 20x2 + 27x + 9 C. 20x2 + 3x + 9 D. 20x2 + 9
Solve the problem.The radius, r, of a sphere can be found using the formula 
where S is the surface area. If the surface area is 5007 square inches, what is the radius? (Use ? ? 3.14 and round to the nearest tenth.)
A. 40.0 in. B. 35.4 in. C. 62.7 in. D. 20.0 in.