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8_murik_8 [283]
3 years ago
15

What is the percent of decrease from 100 to 45?

Mathematics
1 answer:
GuDViN [60]3 years ago
7 0

Answer:

percentage decrease is always calculated like this

((orignal - new ) / original ) 100

So in this case

100-45= 55

55/100 is 11/20

11/20 * 100/1 is well simplified is 55

so 55%

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Step-by-step explanation:

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3 years ago
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What is the value in millions of dollars of a downtown office building that cost 12 million dollars to build 20 years ago and de
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Answer:

The value in millions of dollars of a downtown office building that cost 12 million dollars to build 20 years ago and depreciated at 9% per year is $1819738.95

Step-by-step explanation:

Cost of building 20 years ago = 12000000

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Formula : N(t)=N_0(1-r)^t

Where N(t)= Population after t years

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4 0
3 years ago
Christopher scored 7 more than two times the questions Mathew scored on the math test. If Christopher scored 87 on the math test
viktelen [127]

Answer:

40

Step-by-step explanation:

To solve this, we can create an equation that represents this situation. Since Christopher score 7 more than twice what Mathew scored, the equation will be:

C = 2M + 7

(Variables are representative of the first letter of each name)

Seeing as Christopher scored 87, we can put that into the equation and solve for M.

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87 = 2M + 7

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