The equation would be Tan(p)=x/50 or 0.8=x/50 (since tan of an angle=the opposite side/the adjacent one)
Thus multiplying 50 by both sides we get, x=0.8*50=40 ft and that's your answer (where x is the height of the building ).
There are multiple ways to do this.
The easiest is to just continuously subtract 7 from 65 the numbers of times needed.
But most math teachers will have you use the equation ar^n-1 where a= the first term (65), r=ratio (-7), and n=the term you need (second, fifth, and ninth).
So to solve you just plug your values in as so
AR^n-1
(65)(-7)^2-1(65)(-7)^5-1
(65)(-7)^9-1
The answer should be -2 hope this helps /)
56 -32 =24
then
24 / 4 = 6
so, he ate 6 strawberries
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