Answer:
12 dozen
Step-by-step explanation:
create a proportion of: dozen cookies / cups of pecan
let 'd' = dozen cookies
(3/1 ÷ 5/4) = (d ÷ 5)
simplify 3/1 ÷ 5/4 to be: 3/1 x 4/5, which equals 12/5
12/5 = d/5
cross-multiply to get:
5d = 60
d = 12
Answer:
640 cm²
Step-by-step explanation:
Given 2 similar figures with ratio of sides = a : b, then
ratio of areas = a² : b²
Here the ratio of sides = 5 : 20 = 1 : 4, thus
ratio of areas = 1² : 4² = 1 : 16
The area of ABCD is 16 times the area of EFGH, so
area = 40 × 16 = 640 cm²
