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Suppose the maximum mass a person can lift is 21kg. A Counterbalance is set up to help that person lift other objects. Calculate the minimum mass of the counter weight for the person to lift a 60kg object with an acceleration of 1.75m/s^2.

List the elements of the set in roster notation. (enter empty or ∅ for the empty set.) {x | x is a letter in the word hippopotamus}

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?