38. Round off each of the following numbers to two significant digits, and express the result in standard scientific notation.
a. 1,566,311
c. 0.07759
b. 2.7651 X 10-3
d. 0.0011672

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

b

explanation:

mitosis

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%).

i wish i could but this one is weird give me abc and i can solve it.