The boundary of A = (1, 3) ×[4,6] in the cofinite topology of R^2 is OR^2
O(({1}×[4,6]) U ((1,3) x {6}))
O({1,3}× [4, 6]) U ((1, 3) x {4,6})
О emty​

the third picture

step-by-step explanation:

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

answer: h=5.6 i don't really know how to put into words, so i though i would let you do that. i hope i was able to some

step-by-step explanation:

18 = 6(h)+1/2

18 = 6h+1/2

18-1 = 6h/2

17 = 3h

17/3 = h

h = 5.6