A map has a scale of 1 cm : 5 km. Determine how far apart two cities are if they are 4 cm apart on the map?
1 answer:
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Hope this helps with the answer to your question:) (sorry I didn't know how to do question 30)
Answer:
a₁ = 6
Step-by-step explanation:
The sum to n terms of a geometric sequence is
=
where a₁ is the first term and r the common ratio
Here = 1530 and r = 2, thus
= 1530 , that is
a₁ (256 - 1) = 1530
255a₁ = 1530 ( divide both sides by 255 )
a₁ = 6