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The area of a rectangle is 22 square feet. If the length is 4 feet more than 6 times the width, then find the dimensions of the rectangle.? Let f be the function given by f(x)=2cosx+1. What is the approximation for f(1.5) using the line tangent to the graph of f at x=π/2? How can we say that 1/4 wavelength dipole has impedance of 36.5, without knowing the size or material of the antenna, i can't understand? How many arrows would it take to equal the energy of a .50 BMG round? Dinitrogen pentoxide exerts a pressure of 4232 mmHg at 678oC. Calculate the density of this gas under these conditions.?