1.22 Generate plots for each of the following functions over the time span from −4 s to +4 s. (a) x1(t) = 5r(t + 2) − 5r(t) (b) x2(t) = 5r(t + 2) − 5r(t) − 10u(t) ∗(c) x3(t) = 10 − 5r(t + 2) + 5r(t) (d) x4(t) = 10rect?t + 1 2 ? − 10rect?t − 3 2 ? (e) x5(t) = 5rect?t − 1 2 ? − 5rect?t − 3 2 ?

to have more of what you want like money

step-by-step explanation:

save it by not spending on unnecessary stuff and have more

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step-by-step explanation:

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3

sounds & other waves originate from any vibrating object