What is the composition of the most common mineral compounds that make up earths crust and mantle
2 answers:
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Answer:
Approximately 23%
Step-by-step explanation:
we know that
The high school graduating class of 2010 was 260 people
5 years later the high school graduating class was 320 people
In this problem
260 people represent the 100%
so
using proportion
Find out what percentage represent the difference (320-260)=60 people
Let
x -----> the percentage