32. Last week, Jerry's house used 350 kilowatts of energy. If this week his house uses 420 kilowatts of energy find the percentage of increase of
energy used,

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %