Answer:
4
Step-by-step explanation:
The sum to n terms of a geometric sequence is
= ![\frac{a(r^n-1)}{r-1}](https://tex.z-dn.net/?f=%5Cfrac%7Ba%28r%5En-1%29%7D%7Br-1%7D)
where a is the first term and r the common ratio
Here r = 5 and a has to be found, thus
=
, so
= 15624
Multiply both sides by 4
15624a = 62496 ( divide both sides by 15624
a = 4
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Answer
six dollars
Step-by-step explanation:
Answer:
x = 6
Step-by-step explanation:
subtract 10 from both sides -> 4x = 24
divide by 4 to get x = 6
Answer:
1/2pi
Step-by-step explanation:
Since the formula for circumference is 2*pi*r and we know the R=1 so the of the whole circle is 2pi. This is a quarter of a circle so the answer is 1/2pi