Giancoli Ch. 23 – p. 659, Problems #7-16 key

7) 36.0 cm
8) 11.5 cm
9) image is 2.09 cm behind the surface, virtual and upright
10) 4.2 m
11) concave; radius is 5.7 cm
12) convex; radius is 20 m
13a) -7 cm

13c) 1.0 mm
14) -6.0 m
15a) placed at center of curvature
15b) real image
15c) inverted image
15d) -1
16) convex; radius is -36.0 cm