Find the unknown side (w) of the rectangular solid. Please help..

What are the soultion(s) to the quadratic equation 40- x^2=0

Write the percent as a fraction or mixed number in simplest form. 0.8%

Will give brainliest for correct answer 8. use the distance time graph to answer these questions: a. what does the graph tell us about the velocity of the car? b. what is the average velocity of the car? (show work) c. is the velocity reflected in the graph positive or negative?d. is there any point on the graph where the car is not moving? how do we know?