Which of these numbers is a square number? A
B
4 * 10 9 ~ 104
D
9 x 10
4 x 10

isn't it a pentagon? sense [3 (triangle) + 4 (rectangle)] - 2 (triangle and rectangle connected) = 5 (pentagon)

question: the type of image formed by a convex lens is determined by the objects?

answer: it depends on the shape of the lens and the position of the object.

explanation: because if it was not positioned correctly it would have a diffrent image of what you were expecting to see

question answered by

(jacemorris04)

0.61 has 2 decimal places, so we put the decimal digits of 0.61, 61 over 1 followed by the number of zeroes equal to the number of decimal places, 

2:     61/1 = 61/100.