Find the value of x in the triangle shown below. X° 27° 68°

Mathematics

2 answers:

Nastasia [14]3 years ago

5 0

Answer:

85 degrees

Step-by-step explanation:

i added the angles and then i subtracted it from 180

Juli2301 [7.4K]3 years ago

3 0

Answer:

Hello! answer: x = 85

Step-by-step explanation:

Triangles add up to 180 degrees 27 + 68 = 95

180 - 95 = 85 therefore x = 85

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Dubnium-262 has a half-life of 34 s. How long will it take for 500.0 grams to

dmitriy555 [2]

Answer:

the time taken for the radioactive element to decay to 1 g is 304.8 s.

Step-by-step explanation:

Given;

half-life of the given Dubnium = 34 s

initial mass of the given Dubnium, m₀ = 500 grams

final mass of the element, mf = 1 g

The time taken for the radioactive element to decay to its final mass is calculated as follows;

$1 = 500 (0.5)^{\frac{t}{34}} \\\\\frac{1}{500} = (0.5)^{\frac{t}{34}}\\\\log(\frac{1}{500}) = log [(0.5)^{\frac{t}{34}}]\\\\log(\frac{1}{500}) = \frac{t}{34} log(0.5)\\\\-2.699 = \frac{t}{34} (-0.301)\\\\t = \frac{2.699 \times 34}{0.301} \\\\t = 304.8 \ s$