exam Maths Puzzle Numerical Ability

help me please!
Science and medicine. Find the time required for an object to fall to the ground
from a building that is 1400 ft high.

Use the formula
Science and medicine.

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exam Other Question
A toy company manufactures toy cars and toy boats. Toy cars require 1 unit of plastic and 3 units of metal. Toy boats require 2 units of plastic and 1 unit of metal. There are 17 7/x+2+5/x^2-2x+4=84/x^3+8