180-115=65
65+70=135
180-135=45
SO C.45
prettStep-by-step explanation:
Answer:
45
Step-by-step explanation:
Let the first term be a and the common difference be d.
So -18=4a+6d and -9=6a+15d. Solving this we get a=-9 and d=3.
So the sum of first 10 terms is 5*(2*(-9)+9*(3))=45
F(t) = P.e^(r.t) [ and not as you wrote it f(t)+Pe^rt]
plug in:
f(t) = 8.e^(0.08t) (where e = 2.718 and t=8 given, f(8))
f(8) = 8.(2.718)^(0.08*8) = 21.74^(0.64)
f(8) = 7.17
