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ch4aika [34]
3 years ago
7

In 1997 there were 31 laptop computers at grove high school. starting in 1998 the school bought 20 more laptop computers at the

end of each year. the equation t=20x 31 can be used to determine t, the total number of laptop computers at the school x years after 1997. what was the total number of laptop computers at grove high school at the end of 2005?
Mathematics
1 answer:
Ksenya-84 [330]3 years ago
7 0
We have equation:
t=20x+31
x is number of years after 1997.

To calculate number of laptops in 2005:
x=2005-1997
x=8

t=20*8+31
t=160+31
t=191

In year 2005 school had 191 laptops.
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The population of the world grows exponentially at a rate of 1.1% per year.
natima [27]

Answer:

4

Step-by-step explanation:

Every year, the world grows by 1.1%. Converting to a decimal, we can divide by 100 to get 1.1% = 0.011. This means that the world grows by 0.011 exponentially each year. To put this into an expression, we can add 1 to our percentage to get 1.011. This represents 1 = 100% (the original population) and the growth of 1.1% = 0.011. We multiply the rate including the growth by the population to get the population after one year. After the first year, we have

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Therefore, to get from 7 billion to 7.31 billion, we have

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divide both sides by 7 billion to relatively isolate the x

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Another way of writing this is

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7 0
3 years ago
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6 0
3 years ago
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taking square roots:-

x + 10  = 11
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8 0
3 years ago
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