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romanna [79]
3 years ago
11

Carbon-11 has a half-life of about 20 minutes. If we start with 200 grams, how much will be left after 3 hours?

Mathematics
1 answer:
nata0808 [166]3 years ago
4 0

Answer:

0.39

Step-by-step explanation:

Hope it is helpful....

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Determine the constant of variation for the direct variation given.
ohaa [14]

Answer:

B. 5

Step-by-step explanation:

We have been given that R varies directly with S. When S is 16, R is 80. We are asked to find constant of variation.

We know that two directly proportional quantities are in form y=kx, where,

k = Constant of variation.

Upon substituting our given values, we will get:

R=k*S

80=k*16

\frac{80}{16}=\frac{k*16}{16}

5=k

Therefore, the constant of variation is 5 and option B is the correct choice.

6 0
3 years ago
How many factors in the expression 8(x + 4)(y + 4)(z to the second power + 4z + 7) have two terms?
dedylja [7]
(x+4) and (y+4) both have two terms..terms are separated by addition/subtraction operators
8 0
3 years ago
Ms. Lopez fried 60 gorditas for the 7th and 8th grade students in Ms.
seraphim [82]

Answer:

3 each

Step-by-step explanation:

60 divided by 20

6 0
3 years ago
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A certain number has exactly 8 factors including 1 and itself. 2 of its factors are 21 and 35 what is the number?
vodomira [7]
21 = 3.7
35 = 5.7

probably the factors have 3.5.7
= 105

let's try :
1 . 105
3 . 35
5 . 21
7 . 15
Yep, correct.
6 0
3 years ago
A company had 488 customers. Only 50% of the company's customers bought makeup. Only 50% of the customers that bought makeup sai
Hunter-Best [27]

Answer:

1. 244

2. 122

3. 61

Step-by-step explanation:

1. 244 because I divided 488 by 2.

2. Divide 244 by 2.

2. Divide 122 by 2.

5 0
2 years ago
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