Rosie went on a hiking trip. the first day she walked 181818 kilometers. each day since, she walked 90\%90%90, percent of what she walked the day before. what is the total distance rosie has traveled by the end of the 10^\text{th}10 th 10, start superscript, t, h, end superscript day? round your final answer to the nearest kilometer.

117 km

Explanation:

The 1st day, Rosie walked

The 2nd day, she walked 90% of the distance walked the previous day, so

Similarly, on the 3rd day she walked

So the distance walked at the nth day is

This is a geometrical series of the form

where and . The sum of such a series is given by

So for n = 10, we find:

measure their densities same density, same sub

which three statements are true about all alloys?