Why are control groups included in experiments? Question 8 options: a) to determine whether two variables are related b) to ascertain cause-and-effect relationships c) to ensure the inclusion of confounding variables d) to ensure that participant characteristics are essentially the same in each group

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

the style of music that was composed during the classical era was concerto grosso.