Find the area of a triangle whose base is 4 2/3 and altitude 8 4/7 feet

Answer:
20 ft^2.
Step-by-step explanation:
Change the mixed numbers to improper fractions.
4 2/3 = (12+2) / 3 = 14/3
8 4/7 =(56+4)/7 = 60 / 7
The area of the triangle = 1/2 * base * altitude
= 1/2 * 14/3 * 60/7
= 840 / 42
= 20 (answer).