Solve the equation by using the quadratic formula.

4x^2 − 7x + 3 = 0
question 4 options:

a.8 & 6

b.1 & 3/4

c.4 & 3

d.8 & 6/8

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

rounding to the nearest thousandth would be 452,000