Unit 8 right triangles & trigonometry

Mathematics

1 answer:

Tatiana [17]3 years ago

7 0

Jsbejdu osne d isbebe

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mai walk around a soccer field 2 times. She thinks she walked about a kilometer. Do you agree with Mai ? Explain your answer

Margaret [11]

Answer:

Step-by-step explanation:

I would not agree with Mai because 1km equals one thousand meters and soccer fields in general are 90 to 120 meters long and 45 to 90 meters wide so it impossible that she could have walked 1km even if she walked around it twice

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3 years ago

In a lab experiment, the decay of a radioactive isotope is being observed. At the beginning of the first day of the experiment t

GaryK [48]

Using an exponential function, it is found that the mass of the radioactive sample at the beginning of the 13th day of the experiment was of 169.1 mg.

<h3>What is an exponential function?</h3>

A decaying exponential function is modeled by:

$A(t) = A(0)(1 - r)^t$

In which:

A(0) is the initial value.

r is the decay rate, as a decimal.

At the beginning of the first day of the experiment the mass of the substance was 500 grams and mass was decreasing by 8% per day, hence A(0) = 500, r = 0.08, and the equation is given by:

$A(t) = A(0)(1 - r)^t$

$A(t) = 500(1 - 0.08)^t$