the sequence is 4n-13, so substitute 107 into n and it will become 4(107)-13 =415
Answer:
72
Step-by-step explanation:
<em>Since the ratio of blue jays to robin's was 6 to 7 then if there were 84 robins how many blue jays were there.</em>
<em>6 to 7 can also be express as 6/7</em>
<em>Thus, we can set up a proportion</em>
<em>6/7 = x/84</em>
<em>Now, we have to solve for x</em>
<em>x = 72</em>
<em>Hence, if there were 84 robin there would be 72 blue jays.</em>
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<u><em>~lenvy~</em></u>
A^2+b^2=c^2
(2sqrt3)^2+b^2=16
12+b^2=16
solve for b
b=2
Now triangle area is A=1/2 bh
so
A=(1/2)(2)(2sqrt3)
A=2sqrt3
<em>See</em><em> </em><em>above</em><em> </em><em>explanation</em>
I am joyous to assist you anytime.
The length of the fencing corresponds to the length of the perimeter of the garden:

We also know that the perimeter of a circle is given by:

where r is the radius of the circle.
Putting together the two equations, we have

from which we can find r, the radius of the garden: