21/1.5=14
14 years to erode
Given that:
a1=27, an=(an-1)+4
the second term will be:
a2=a1+4
a2=27+4=31
The explicit formula for arithmetic sequence is given by:
an=a+(n-1)d
where:
a= first term
d=common difference
n=nth term
from the information given:
a=27
d=31-27=4
thus the explicit formula will be:
an=27+(n-1)4
an=27+4n-4
an=23+4n
Answer: an=23+4n
Answer:
IM JUNNA HAFT TO SAY IS 60
Step-by-step explanation:
Answer:
$543.84
Step-by-step explanation:
Find the area of the room:
11*12 = 132ft^2
Multiply the area by the cost per square foot:
132*4.12 = 543.84 dollars
Answer:
wdee
Step-by-step explanation:
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