-Pencils were first used in 1662.
-Graphite is a crystalline form of the element carbon with its atoms arranged in a hexagonal structure.
- HB is a graphite hardness/grading scale: the higher the number next to H, the harder and lighter/less dark the pencil lead is.
- The H stands for “hard.”
Answer:
The answer is true.
Explained: they are all in charge if projecting the environment
Sorry but i really don't understand that question
Answer: the population has a mean of less than 30
Explanation:
In interval estimation, the t distribution is applicable only when a. the population has a mean of less than 30. the sample standard deviation (s) is given instead of the population standard deviation
Answer:
According to Islamic tradition, the Qur'an was first compiled into a book format by Ali ibn Abi Talib.
Explanation:
.
