Answer:
Step-by-step explanation:
Given data:

standard deviation is 
As distribution is normal in shape and values are symmetrical
The standard deviation rule says that 95% of observation lies between the second standard deviation of the mean
so, approximately only 5% of observation lies outside the interval and normal shape is symmetric. hence approximately 0.15% of observation lies above the interval


almost 0.15% of students spent more amount is 529
Answer:
I think the answer is 33
Step-by-step explanation:
Extremely sorry if it's wrong
The triangle of height 5 units and base 7 units will be as follows:
18+21=39
33+49=82
Just add them together