The answer is B.
Because the slope= 3x.. and to find the perpendicular line, you need to flip the variable to a fraction and make it negative.
You have to multiply the coefficient and add the exponents of the variables
7.0717 million
Lets see:
1 million = 1.000.000
So, 7.0717 million = 7.071.700
7.071.700 can be read as "seven million seventy one thousand and seven hunred"
If you wanna split it you can split in
seven million = 7 million
seventy one thousand = 71 thousand
seven hundred = 7 hundred