Answer:
Step-by-step explanation:
There are approximately 7.5 × 10¹⁸ grains of sand on earth.
There are approximately 7 × 10²⁷ atoms in an average human body.
A. There are more atoms in an average human body. When comparing the order of magnitude of each number 27 it greater than 18.
7 × 10²⁷ > 7.5 × 10¹⁸
B. Now we will calculate how many times more atoms are in a human body compared to grains of sand on earth.
=
≈ 1 × 10²⁷⁻¹⁸
≈ 1 × 10⁹
≈ 10⁹
There are approximately 1,000,000,000 atoms more in a human body compared to the grains of sand on earth.
Answer:
Subtract 4
Step-by-step explanation:
-3 - 4 = -7
-7 - 4 = -11
-11 - 4 = -15
Answer:
The probability that a fair coin lands tail up is 1/2, which is equal to 0.5.
Step-by-step explanation:
There are two possible outcomes when a coin is flipped (saving for the case when the coin lands on its side.)
If the coin is fair, the two outcomes should be equally likely. In that case, apply the following formula:
.
Credit for the phrasing of this probability formula goes to the Khan Academy article "Probability: the basics".
Answer: 1:2
Step-by-step explanation: