The explicit rule for an arithmetic sequence is an=8.7+(-1.4)(n-1) what is the value of the 47th term? round to the nearest tenth, if necessary.
a. –55.7
b. –26.4
c. 45.6
d. 65.8

Option 'A' is correct.

Explanation:

Since we have given that

The explicit rule for an arithmetic sequence is

We need to find the value of 47th term,

We will put the value of n = 47

So, we get,

Hence, Option 'A' is correct.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

2nd one in the first row is correct