Class 10r sat a test. the mean mark of the class was 70%. there are 30 students in class 10r, 20 of whom are boys. the mean mark for the boys in the test was 62%.work out the mean mark for the girls.

86%

70X30=2100

20X62=1240

2100-1240 = 860

860/10=86

Earth is growing warmer

Explanation:

This is the topic of this summary because in the summary it states that "temperature changes will cause more frequent heatwaves, droughts, wildfires, and other extreme weather events." Then they start going into how  global warming as the cause of the polar ice caps melting" Scientists have this theory on why the Earth is growing warmer from humans to Global warming changing temperature and why things are happening when they shouldn't be natural.

Hope that helps