What substance was the first photograph made from? .choices: bitumen. silver. lemon juice. acidic acid

That photograph, formed on the surface of a lithographic rock, was later effaced. In 1826 or 1827 he again snapped the same scene, the view from a window in his house, on a coat of bitumen-coated pewter. The effect has survived and is now the oldest known camera photograph yet in presence.

soft,hard and rough for soft would be a pillow or a stuffed animal hard wood floor or a table rough paint

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