A radioactive material has a half life of 10 years. What is the fraction of the initial isotope is left after 60 years
Answers
Answer:
1/64
Step-by-step explanation:
10 = ½
20 = ¼
30 = ⅛
40 = 1/16
50 = 1/32
60 = 1/64
Answer:
0.015625 left.
Step-by-step explanation:
If we start with say 100g of the material, in 10 years there is 100 * 1/2 =
50g left ( = 0.5 left).
In 20 years there is 100*(1/2)^2 = 25 g left.
In n*10 years there is 100(1/2)^2 g
So in 60 years there is 100(1/2)^6 = 1.5625 g left
This is 1.5625 %
= 0.015625 of the origin material left.
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7.
8.
A
50°
125% y
yº 135°
Section
Section
Answers
7. x = 75, y = 55
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A.
A card is drawn from the box and the number is odd.
A card is drawn from the box and the number is 10.
B.
A card is drawn from the box and the number is even.
A card is drawn from the box and the number is 4.
C.
A card is drawn from the box and the number is even.
A card is drawn from the box and the number is 8.
D.
A card is drawn from the box and the number is a multiple of 3.
A card is drawn from the box and the number is 6.
Answers
As in option A, both statements can not be true at the same time.
In option A, first statement is that the card drawn has odd number and second statement is card drawn is 10, which can not be possible at the same time.
In option B, both statements can be true at the same time.
In option B, first statement is that the card drawn has an even number and second statement is card drawn is 4, which can be possible at the same time.
In option C, both statements can be true at the same time.
In option C, first statement is that the card drawn has an even number and second statement is card drawn is 8, which can be possible at the same time.
In option D, both statements can be true at the same time.
In option D, first statement is that the card drawn has a number which is multiple of 3 and second statement is card drawn is 6, which can be possible at the same time.
So, the events of option A are mutually exclusive.
Answers
If you get it wrong, it's my fault, not yours :)
B.p = 100
C.p = 40
D.p = 28
Answers
Answers
Answer:
A.
Step-by-step explanation:
To get to the answer, add both f(x) and g(x) together. This would be (2x^2 +3x -4) + (-4x^2 + 5x - 8). Remember that adding a negative number is the same as subtracting the positive of that number, for example, 3 + (-4) is the same as 3 - 4.