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eleaanastasiawo
26.03.2021 •
Mathematics
The second hand on Mr. Adam's watch is 0.25 inches long. How fast is the tip of the second hand moving? Give your answer in inches per second rounded to the nearest hundredth.
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Ответ:
Step-by-step explanation:
Let say n the number of pennies in the jar.
n is a multiple of 7 : n=7*k
n-1 is a multiple of 2,3,4,5,6,8 so a multiple of the lcm= 120
n-1=120*t
n-1=120*t
n=7*k
120*t=7k-1
7k=120*t+1
The least number of pennies is 721 (when a=0)
Proof:
n-1=720
720/2=360
720/3=240
720/4=180
720/5=144
720/8=90
721/7=103