Answer:
The correct option is C: the isotope of iodine contains 81 neutrons.
Step-by-step explanation:
The mass (A) of the iodine isotope is given by:

Where:
Z: is the number of protons
N: is the number of neutrons
For iodine Z= 53, so if A = 134 the number of neutrons is:

Therefore, the correct option is C. The isotope of iodine contains 81 neutrons.
I hope it helps you!
D = -28 / 4N+25
Hope this helps.
Answer:
I believe it is C. The square root of 47
Step-by-step explanation:
Because the distance from her house to the pool is about 6 and the square root of 47 is 6.8
Answer:
7.071 cm
Step-by-step explanation:
The answer is 1,250 as you add all the items together