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wolffee895
22.06.2019 •
Mathematics
Joshua likes to read he read 6 books when he was 6 years old every year he doubled the number of book he read the previous year how many total books did he read between the ages of 6 and 10?
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Ответ:
Joshua read 186 books form 6 to 10 years of age.
Step-by-step explanation:
Joshua reads 6 books at the age of 6.
He doubled the number of books he read the previous years.
Now the sequence will be a geometric sequence as
6, 12, 24, ......
We have to calculate the number of books he read from 6 years to 10 years of his age.
Since sum of n terms of a geometric sequence is given by
where a = first term
r = common ratio
n = number of terms
=![\frac{6(32-1)}{1}](/tpl/images/0003/2570/29d51.png)
= 6×31
= 186 books
Therefore Joshua read 186 books form 6 to 10 years of age.
Ответ:
density = mass/ volume
density= 2700/500
= 25/5 cm 3
(cubic centimeters)