In an optical fibre, the power drops by a factor of 10 approximately every 30 km. If the transmit power is 0.35 W, how far will a signal be transmitted before the power is attenuated to 350 μW?

What is the least common multiple of 16 and 3?

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!