World war 1 lasted from august 4th 1914 until november 11th,1918.during this time an estimated 10million lives were lost. about how many people were dying per day?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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)

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0