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Tcecarenko [31]
2 years ago
11

An element with mass 590 grams decays by 19. 5% per minute. How much of the element is remaining after 15 minutes, to the neares

t 10th of a gram?
Mathematics
1 answer:
solmaris [256]2 years ago
5 0

Answer:

Step 1

Formulate a recursive sequence modeling the number of grams after n  minutes.

we have that

100%-17.1%-------------- > 82.9%------------> 0.829

a(n) = 780*[0.829^n]

for n=19 minutes

a(19)=780*[0.829^(19)]=22.1121 g---------------> 22.1 g

the answer is 22.1 g

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Given

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4x = 5 ± 7, thus

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or

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As a check

Substitute these values into the left side of the equation and if equal to the right side then they are the solutions.

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left side = (- 2 - 5)² = (- 7)² = 49 = right side ⇒ solution

x = 3

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