The science department buys the equipment shown in the table. they bought all three items this year. in how many years will they have to buy all three items again. what was the strategy to yes to solve the problem. microscopes every 5 years , safety goggles every 4 years , test tubes every 2 years.

20 years

Step-by-step explanation:

20 is the lowest common multiple of 5,4,2

the answer is in 20 years

Step-by-step explanation:

5): 5, 10, 15, [20]

4): 4, 8, 12, 16, [20]

2): 2, 4, 6, 8, 10, 12, 14, 16, 18, [20]

5 deaths per minutes ( approx  )

Step-by-step explanation:

Since, 1 year = 365 days,

1 day = 24 hours,

1 hour = 60 minutes,

⇒ 1 year = 365 × 24 × 60 = 525600 minutes,

Given,

The deaths in 1 year = 2800000

Deaths in 525600 minutes = 2800000

Deaths in 1 minute =

Hence, there are 5 deaths per minute ( approx ).