The next train will arrive in 32 minutes and 30 seconds. In how many seconds will the next train arrive? Enter your answer in th
2 answers:
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Answer:
4
Step-by-step explanation:
The sum to n terms of a geometric sequence is
=
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
Answer:
450 millilitres
Step-by-step explanation:
1) of the water is gone, so you need to divide 900 by 2 to see how much is left
900÷2 = 450