Metal roof decking is under division ________.
Fill in the blank(s) with the appropriate word(s).
Answer: 5
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One of the newer blast cleaning methods uses baking soda.
Answer the following statement true (T) or false (F)
Installing windows and exterior doors in a house is the final step in _____.
a. finishing b. thermal protection c. drying-in d. envelope sealing
The signal x [n] is defined in Figure E.14. Let y [n] be the first backward difference of x [n] and let z [n] be the accumulation of x [n] . (Assume that x [n] is zero for all n < 0).
(a) What is the value of y [4] ?
(b) What is the value of z [6] ?
Given a signal 
impulse sample it at the rate specified by multiplying it by a periodic impulse of the form 
Then filter the impulse-sampled signal with an ideal lowpass filter whose gain is 
in its passband and whose corner frequency is the Nyquist frequency. Graph the signal x (t) and the response of the lowpass filter xi (t) over two fundamental periods of xi(t).
