What's the exact area of triangle DEF shown in the graph? A) 24 square units
B) 36 square units
C) 15 square units
D) 18 square units

Which statements regarding the diagram are true? check all that apply.

Which of the following expressions is equal to 2x^2+8

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)