40 km - meters is 40 * 1000 whch is 40000 meters per hour
877.71=877.7
when rounding, look at the previous place value to determine if you should round up or down :)
The vertex of this parabola has coordinates (1,-1).
The axis symmetry goes trough the vertex. The equation of the axis of symmetry is x=1.
All you do is add them all together...
20 + 11.4 + 11.4 + 4.5 + 4.5 + 0.45 + 0.45 + 0.45 + 0.45 = 53.6Kg
(note that 0.45 is 450g in Kg, When adding things such as weight or length you want to make sure that they are all in the same unit)
The value of 3 in 6300 is 10 times the value of 3 in 530
