3. Mrs Chen bought an equal number of green apples and red apples.
After she gave 8 red apples to her friends, she had 3 times as many green
apples as red apples left. How many apples did she buy in all?​

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

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)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much