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Nimfa-mama [501]
3 years ago
6

The half-life of the radioactive isotope gallium-70 is 20 minutes. The initial amount of gallium-70 is 25 milligrams. When will

only 10 milligrams be left. How many milligrams are present after 1 hour?
Mathematics
2 answers:
mafiozo [28]3 years ago
7 0

Answer:

Bulls and Bears

The bull depicts investors who are optimistic about future prospects of the stock market and believe an upward trending market is on. The polar opposite is the bear; an investor who is convinced that the market is headed for a fall.

stiv31 [10]3 years ago
6 0

Answer:

Whether or not a given isotope is radioactive is a characteristic of that particular isotope. Some isotopes are stable indefinitely, while others are radioactive and decay through a characteristic form of emission. As time passes, less and less of the radioactive isotope will be present, and the level of radioactivity decreases. An interesting and useful aspect of radioactive decay is half-life, which is the amount of time it takes for one-half of a radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by coTnditions and is independent of the initial amount of that isotope.

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v = 22.59

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Mr. Morris is going to save money and replace his sailboat's mainsail himself. He must determine the area of the mainsail in ord
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Answer:

Area of parallelogram is 150 square ft

Step-by-step explanation:

Given the parallelogram in the figure whose height is 10 ft and base length is 15 ft.

Area of parallelogram is base \times height

                                       = 15\times 10ft^2

                                       = 150 square ft

now we have to decompose this parallelogram into rectangles and triangles and then to determine the shape.

The given parallelogram KLMN can be decomposed into 2 triangles and one rectangle.

2 right angled triangles KPL and NOM by construction

KL^{2}=KP^{2}+PL^{2}=10^{2}+2^{2}                                          =100+4=104

⇒ KL=\sqrt104=10.2 ft=MN         (∵ KLMN is a parallelogram)

Hence, dimension of triangles are 10 ft, 2 ft and 10.2 ft

Now rectangle KPON with dimension 15 ft and 10 ft because KP and NO are perpendiculars on LM.



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