What does the 'X' represent in the formula? *

arc degree
radius
pi
circumference
length of an arc

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

In the rectangle below ac=30 units what is de

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)