the answer is 43.5.
Half of 174 is 87
The half-life of Rubidium-87 is about 48.8 billion years. To determine the number of half-lives in 4.6 billion years, you divide the age of the Earth by the half-life of Rubidium-87: 4.6 billion years / 48.8 billion years ≈ 0.0943 half-lives. Thus, the age of the Earth represents approximately 0.09 half-lives of Rubidium-87.
87 and a half percent:87 1/2%= 87.5%= 0.875 in decimal= 875/1000 or 7/8 in fraction
No, the number 87 is composite.
yes
87 is composite.
87 is, itself, a whole number.
43.543.5 is half of 87.
87 is not a prime number because 87 is divisible by 3 and 29.
The half-life of Rb-87 is approximately 48.8 billion years. This means that it takes that amount of time for half of a sample of Rb-87 to decay into its daughter isotopes.
The number 87 can be divided evenly by 1, 3, 29, and 87. These are the factors of 87, as they divide into 87 without leaving a remainder. Additionally, the number 87 is a composite number, as it has more than two factors.
Since the sum of the proper factors of 87 is only 33, 87 is not an abundant number.