Four-digit license plates are made using the digits 2, 3, 4, 6, and 9. Digits can be repeated, but every plate must be an even number whose hundred's digit is 3 or 9. What is the number of different plates possible? Please help! Need response fast, so anything will help.

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

The conversion factor relating feet to meters is 1 ft=0.305 m. keep in mind that when using conversion factors, you want to make sure that like units cancel leaving you with the units you need. you have been told that a certain house is 164 m2 in area. how much is this in square feet?

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)