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balandron [24]
3 years ago
6

Radium-226, a common isotope of radium, has a half-life of 1,620 years. How many grams of a 120-gram sample will remain after t

years?
Mathematics
2 answers:
Elina [12.6K]3 years ago
8 0

For the first part it’s A

For the second part it’s 115 years

ankoles [38]3 years ago
4 0

Answer:

P(t)=120(1/2)^t/1620

Step-by-step explanation:

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6-4x=(3-x)<br> A) -2<br> B) 2<br> C) all real, numbers<br> D) no solution
Semmy [17]
6 - 4x = (3 - x)

Subtract 6 from both sides, as well as adding x to both sides.

-4x + x = 3 - 6

Add like terms.

-3x = -3

Divide both sides by -3.

x = 1

So, your answer is c) All real, numbers because all of the other answer choices are wrong. 

We know this because a) and b) are incorrect. To know if they are incorrect, you just plug in the numbers. When 2 and -2 are plugged into the equation, it is incorrect. So, you solve the equation, and you now know that it is not D) because there is a solution. 

So, once again, your answer is C.

~Hope I helped!~

6 0
3 years ago
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Wilma can mow a lawn in 3 hours. If Kyle helps her with another mower, the lawn can be mowed in 2 hours. how long would it take
KatRina [158]
It would be 6 hours is Kyle worked alone

7 0
3 years ago
What is the simplified form of the expression? 9. (m^7)^2 a) 2m^14 b) m^49 c) m^9 d) m^14
kupik [55]
(m^7)^2 = m^(7 x 2) = m^14
3 0
4 years ago
What is the difference between an irrational number and an integer?? please explain!
SpyIntel [72]

Answer:

Explanation: Irrational numbers are non-terminating, recurring decimal numbers i.e, a decimal expansion that neither terminates nor becomes periodic which cannot be expressed in the form of a fraction. ... Integer is a complete entity that includes every natural number along with its negatives and zero.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
3. f(x) = 2x + 5<br> Find f(0)
Phantasy [73]

Answer:

5

Step-by-step explanation:

f(x) = 2x + 5 \\ pluggng \: x = 0 \\ f(0) = 2 \times 0 + 5 = 0 + 5 = 5 \\ f(0) =5 \\

8 0
4 years ago
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