Answer:
77
Step-by-step explanation:
-1 + 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 = 77
Hope this helps :)
B. 18.37
1990 - 1960 = 30 = t
Plug in the variable "t" to the equation and solve.
P (t) = 18.37
A: 208cm
B: 27cm
C: 30,000cm
Hope this helps!