Answer:
Explanation:
The th term of an arithmetic sequence is explicitly defined as where is the first term of the sequence and is the the common difference.
From the given first five terms of the sequence we can see that the first term is so .
The common difference, , can be calculated by so we'll find the common difference of the given sequence by letting
.
Now let's plug everything we know.
Answer:
0.4 I'm sorry if it wrong
4/11 because it is divisible by seven
Answer:
The number of fringes at is given as 20.
Step-by-step explanation:
Question
A Galapagos cactus finch population increases by half every decade. The number of finches is modeled by the expression
,
where d is the number of decades after the population was measured. Evaluate the expression for d = −2
Given :
The number of finches is modeled by the expression :
⇒
where is the number of decades after the population was measured.
To evaluate the expression for d=-2
Solution:
In order to evaluate the given expression to find the number of finches at , we will plugin for in the expression and simplify it.
Plugging in in the expression:
⇒
Using negative exponent property. [
⇒
⇒
⇒ (Answer)
Thus, the number of fringes at is given as 20.
This means the number of fringes two decades ago was 20.