42. In an experiment, a radio-controlled car takes 2.50 ± 0.05 s to travel 40.0 ± 0.1 m. What is the car’s average speed and the uncertainty in this value?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Which of the following is the result of expanding

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?