Sắp xếp các hợp chất: HF, HI, HBr, HCl theo chiều giảm dần tính axit. A. HF > HCl > HBr > HI. B. HF > HBr > HI > HCl.
C. HF > HBr > HCl > HI. D. HI > HBr > HCl > HF

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

sure im new too!

explanation: