An 80° angle should be used to shoot the weapon. If you want to precise then it would be an 80.5376° angle. Hope this helps!
Answer:
correct option for first blank is 5/4 and for second blank is 
i.e m= 
Step-by-step explanation:
The given equation

and we have to find m= ______ ± ________
We can use quadratic formula to solve this question.
The above equation can be written as: 
and the formula used will be:

Putting values of a= 1, b= -5/2 and c= 11/2 and solving we get:
Since there is - sign inside the √ so
is equal to i and we have to divide
into its multiples such that the square root of one multiple is whole no so,
=
=
Putting value of
and 
the value of m= 
so, correct option for first blank is 5/4 and for second blank is
.
Both of them will have the same amount of money in 2 months