Find the area of a circle with a radius r of 6 feet. round off your answer to one decimal point. hint: the formula for the area of a circle is a = π r2 and π should be approximated to four decimal places.

Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2 . how much is the spring compressed x from its natural length?