Question

Radius of curvature of convex mirror is 15cm then find its focal length.​

Answer 1

Answer:

$f=\frac{r}{2}\\f=\frac{15}{2} \\f=7.5 cm$

Answer 2

Answer:

Copper first came into use as the earliest non-precious metal employed by the Sumerians and Chaldeans of Mesopotamia, after they had established their thriving cities of Sumer and Accad, Ur, al'Ubaid and others somewhere between 5000 and 6000 years ago.please mark me as brainliestplz like me and follow