For this, we use the equation for arithmetic sequence. It is given as:
an = a1 + (n-1)d
where an is the value at n term, a1 is the first term and d is the common difference
For 54,
54 = 12 + (3 -1)d
d = 21
an = 12 + (2-1)21
an = 33
Answer:
2
Step-by-step explanation:
Step 1 write the equation: y=3x-1
Step 2 Plug 1 in: y=3(1)-1
Step 3 Multiply 3 and 1: y=3-1
Step 4 Subtract 3 from 1: y=2
Given that the certain type of spore colony having 50 spores
and a rate of growth of 3 times in 24 hour or one day period, it would grow to
(3 times 50) 150 spores at the end of the first day, (3 times 150) 450 in the 2nd
day, (3 times 450) 1350 in the third day, and (3 times 1350) 4050 spores at
the end of the fourth day.