3 years ago

Make r the formula t=r/r-3

Mathematics

2 answers:

Dafna11 [192]3 years ago

7 0

R = dfrac3 t-1 + t. Brainliest please?

Flauer [41]3 years ago

3 0

Answer:

R = 3t/t₋1

Step-by-step explanation: I'm not sure if its correct.

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The half life of radium is 1690 years. if 80 grams are present now, how much will be present in 830 years

Pachacha [2.7K]

Answer:

A(t) = amount remaining in t years

= A0ekt, where A0 is the initial amount and k is a constant to be determined.

Since A(1690) = (1/2)A0 and A0 = 80,

we have 40 = 80e1690k

1/2 = e1690k

ln(1/2) = 1690k

k = -0.0004

So, A(t) = 80e-0.0004t

Therefore, A(430) = 80e-0.0004(430)

= 80e-0.172

≈ 67.4 g

Step-by-step explanation:

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2 years ago

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3 years ago

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bearhunter [10]

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3 years ago

Tyrone is the supervisor at a water park. His annual salary is $34540. What is his monthly salary?

icang [17]

Answer:

the answer I got was 2878.3

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3 years ago

Please help! Brainliest

Mama L [17]

1.301

Explanation:

Given:

$\log_a5 \approx 0.699$ and $\log_a2 \approx 0.301$

Note that from the properties of logarithms,

$\log_a20 = \log_a(5×4)$

$\:\:\:\:\:\:\:\:\:\:= \log_a(5×2^2)$

$\:\:\:\:\:\:\:\:\:\:=\log_a5 + \log_a(2)^2$

$\:\:\:\:\:\:\:\:\:\:=\log_a5 + 2\log_a2$

$\:\:\:\:\:\:\:\:\:\:\approx 0.699 + 2(0.301)$

$\:\:\:\:\:\:\:\:\:\:= 1.301$

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3 years ago