Answer:
450
Step-by-step explanation:
If the perimeter is 90 inches then each side must equal 30 inches. To find the area of a triangle you mulptiply the base by the height and divide by 2. The base is 30 and the height is 30. 30*30=900. 900/2=450.
C is the right answer I think
A-1 central nervous system
b- peripheral nervous
the first five terms are
a1 = 6
a2 = 24
a3 = 60
a4 = 120
a5 = 210
the experission used to find the five terms is
an = n3+ 3n2+ 2n
