You and your friend play the same note. Your friends instrument is in tune and is playing a note it 256 Hz, but your are slightly out of tune and are playing a note at 260Hz. What is the beat frequency

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

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.