So 33/2 is 11.5 and 11.5=23/2
A(n)=4+4(n-1)
a(n)=4+4n-4
a(n)=4n
76=4n
n=19
The sum of any arithmetic sequence (series are infinite) is:
(a+a(n))(n/2)
The average of the first and last terms times the number of terms, in this case we found that n=19 so:
19(4+76)/2=760
Answer:
A =bh
Step-by-step explanation:
2 1/2 times 5 1/4 = 13.125
3 x 3 x 3 x 3= 81
3 to the fourth power = 81
