A wooden planter is shown. The top section is in the shape of a prism with a square base. The bottom section is in the shape of a frustum of a pyramid with square bases. Compute the number of cubic feet of soil that can be held by the planter when full. Disregard the thickness of the lumber. Round the answer to 3 significant digits.
Fill in the blank(s) with the appropriate word(s).
1.29 cu ft
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In the system of Figure E-17 let the CTFT of the the excitation be 
This system is sometimes called a scrambler because it moves the frequency components of a signal to new locations making it unintelligible.
(a) Using only an analog multiplier and an ideal filter, design a “descrambler” that would recover the original signal.
(b) Sketch the magnitude spectrum of each of the signals in the scrambler-descrambler system.
____ is organic matter used as fuel.
a. Biomass b. Biology c. Biotech d. Biology