In trapezoid abcd, the parallel sides ab and cd have lengths of 8 and 20 units, respectively, and the altitude is 12 units. points e and f are the midpoints of sides ad and bc, respectively. what is the area of quadrilateral efcd in square units?

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

whats the