Urgent multiple choice algebra question:
what is the explicit rule for the geometric sequence? 29.7, 9.9, 3.3, 1.1, 

an=29.7(1/3)^n+1
an=29.7(1/3)^n−1
an=29.7(2/3)^n−1
an=29.7(1/3)^n

  an=29.7(1/3)^(n−1)

Step-by-step explanation:

The first term, a1, is 29.7.

The common ratio, r, is 9.9/29.7 = 1/3.

The generic explicit rule is ...

  an = a1·r^(n-1)

Filling in the values you have gives the explicit rule ...

  an = 29.7(1/3)^(n-1)

Please note that parentheses on the exponent are essential. Without them, the expression has a different meaning entirely.

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

my dear correct answer is option number 3