Since the circle is centered at the origin, we can use the equations
x² + y² = r²
x = r cos θ
y = r sin θ
We know y = 8 and r = 10. Solving for x
x² + 8² = 10²
x = 6
From this equation:
x = r cos θ
6 = 10 cos θ
cos θ = 6/10 = 0.6
0.77875...
which, I'm assuming, they want you to round to the nearest hundredth? So, .78?...
I believe that the answer is A- 8600-5300
Hope this helps!
Answer:

Step-by-step explanation:
The reason is because you don't know the Inital amount she bought and because she visits two days in a row you would multiply
Boba all the way, it is delicious and I can't live without it