Answer:
A) 277 million years
Step-by-step explanation:
Here, decay of U-238 is first order reaction. (since most of the nuclear decays are first order).
so, the equation t = 
× ln(
)
where, t = time from start of reaction
k = reaction constant
A(0) = initial concentration; A = present concentration.
⇒ 4.5 billion = 4500 million years = × ln2.
Now, given 95.82% of parent U-238 isotope is left.
⇒ t = × ln()
t = 
× ln(
)
⇒ t ≅ 277 million years.
Answer: Due to his groundbreaking work in math.
Answer:
300000
Step-by-step explanation:
An easy way to solve this is find 6x5 which is 30 and then add all of the 0s at the end from the equation which is 4 zeros
Answer:
the weight that attached to the spring is 9.5 inches
Step-by-step explanation:
The computation is shown below:
inches per pound is
= 11 inches ÷ 75 pounds
Now for 65 pounds, it would be
= 11 inches ÷ 75 pounds × 65 pounds
= 9.5 inches
Hence, the weight that attached to the spring is 9.5 inches
The same is relevant and considered
Answer:
11
Step-by-step explanation:
5(m - 3) = 40
We're just trying to find the value of m that equals to 40, so let's plug it into the calculator.
The answer is positive 11 because,
5(11 - 3) = 40
