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Anna [14]
2 years ago
13

the science department buys equipment shown microscopes every 5 years safety goggles every four years test tubes every two years

they bought all three items this year in how many years will they have to buy all three items again
Mathematics
1 answer:
bogdanovich [222]2 years ago
4 0
This question requires you to know the lowest common multiple (LCM) of 5, 4 and 2. there are a few ways to do that. in this case the LCM would be 20. this means that in 20 year the science department would buy all 3 equipment at the same time 
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6 0
2 years ago
An athlete trains on a circular track of radius 40 m and jogs 10 laps each day, 5 days a week. How far does he jog each week? Ro
mariarad [96]
Length of a circle=2πr
r=40 m
Length of the circular track=2*π*40m=80π m.

The athelete jogs each day 10 laps
1 lap-------------------80π m
10 laps-------------   x
x=(10 laps * 80π m) / 1 lap=800π m

Calculate how far he jog eache week (5 days).
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5 days----------------   x
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solution: 12566 m

5 0
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Estimate of population 0.61

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