Answer:
11/2, 22/4, 33/6, 44/8, 55/10, 66/12, 77/14, 88/16, 99/18, 110/20, 121/22, 132/24, 143/26, 154/28, 165/30, 176/32, 187/34, 198/36, 209/38, 220/40, and so on ...
Rx= - 21
Rx/r= - 21/r
X=-21/r
9 minutes
Step-by-step explanation:
(2 min(60 s/min)) / 30 test = 4 s/test
135 test(4 s/test) = 540 s
540s / 60 s/min = 9 min
B. 20%
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B