Write an expression that generates the random number indicated below a. integer number between 2 and 20. b. odd integer between 2 and 20. c. real number between 1 and 10 d. real number with one decimal (such as 2.4) between 1 and 10. 5.

12. ritu obtained a distinct image of a distant tree on the screen with the of a concave mirror.to find the focal length of the mirror she has to measure the distance between: (a) mirror and the tree. (b) screen and the tree.(c) mirror and the screen. (d) mirror and tree as well as between screen and the tree.