Clocks are melting on a tree branch, rectangular surface, and a round surface. In the background is a cliff. In the above painting by Salvador Dalí, entitled Persistence of Memory, which of the following objects do not occupy positive space?

a.

the clocks

c.

the tree trunk

b.

the ground

d.

the cliff

D

Explanation:

Because the cliff is on the background

perimeter = 2l +2w, divide total perimeter by 2 for total length of 1 side and 1 width

172/2 = 86 (  total for 1 side and 1 width)

86-24 = 62 (since length is 24 ft longer subtract 24 then divide by 2 for width)

62/2 = 31

width = 31 feet

length = 31 +24 = 55 feet

check: 31*2 = 62, 55*2 = 110,  110+62 = 172