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Elis [28]
2 years ago
6

=

Mathematics
1 answer:
Anna71 [15]2 years ago
7 0

Answer:

A = 502 * e^-(.033 * 68)     amount left after 68 rears

A = 502 e^-2.244 = 53.2 grams    after 68 years

A2 = 502 e^-(.033 * T)    = 251 where T is time for 1 half-life

ln (1/2) = -(.033 * T)

T = -.693 / -.033 = 21.0 years       for the half-life

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3 years ago
What is the angle of BTC, Angle TBC,Angle TCB
Goryan [66]

By geometric and algebraic properties the angles BTC, TBC and TBC from the triangle BTC are 128°, 26° and 26°, respectively.

<h3>How to determine the angles of a triangle inscribed in a circle</h3>

According to the figure, the triangle BTC is inscribed in the circle by two points (B, C). In this question we must make use of concepts of diameter and triangles to determine all missing angles.

Since AT and BT represent the radii of the circle, then the triangle ABT is an <em>isosceles</em> triangle. By geometry we know that the sum of <em>internal</em> angles of a triangle equals 180°. Hence, the measure of the angles A and B is 64°.

The angles ATB and BTC are <em>supplmentary</em> and therefore the measure of the latter is 128°. The triangle BTC is also an <em>isosceles</em> triangle and the measure of angles TBC and TCB is 26°.

By geometric and algebraic properties the angles BTC, TBC and TBC from the triangle BTC are 128°, 26° and 26°, respectively.

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2 years ago
Help please math thank you
bija089 [108]

Answer:

5

Step-by-step explanation:

4 0
2 years ago
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