Which of the following expressions is written in scientific notation? 0.3 • 104 2 • 10-5 10 • 103 12 • 10-3

option (2) is correct.

is in the scientific notation form.

Step-by-step explanation:

Given: Some expressions

We have to choose which expressions is written in scientific notation.

For an expression to be in scientific notation the  most important requirement   is that the whole number is between 1 and 10, but not including 10.

that is   , 1 ≤ a < 10 and n is integer.

Thus, out of given only is in the scientific notation form.

Thus, option (2) is correct.

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

hreryryrranswer:

step-by-step explanation: