The half of Advil or ibuprofen is represented by the equation R=M(0.5)^t/2 where R is the amount of Advil remaining in the body, M is the initial dosage and t is time in hours.

a = 11 : 4

b = 38

c = 1 for every 6

after 1 year: 221 deer

step-by-step explanation:

30% of 170 is 51. 170+51=221

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.