Answer:
r=1,252.3528m
Explanation:
[tex]F_c=ma_c=\frac{mv^2}{r}\\a_c=\frac{v^2}{r}\\r=\frac{v^2}{a_c}\\r=\frac{((1040) (1000)m/(60)(60)s)^2}{(6.8g)m/s^2}\\r=\frac{((1040000)m/(3600)s)^2}{(6.8 \cdot 9.8)m/s^2}\\r=\frac{(288.889m/s)^2}{66.64m/s^2}\\r=\frac{83,456.790m^2/s^2}{66.64m/s^2}\\r=\frac{83,456.790m}{66.64}\\r=1,252.3528m[/tex]