If the standard deviation of the data values in a sample is 13, what is the variance of the data values?
A. 169
B. 225
C. 289
D. 361

An energy plant is looking into putting in a system to remove harmful pollutants from its emissions going into earth's atmosphere. the cost of removing the pollutants can be modeled using the function c = 25000p/100 -p what is the vertical asymptote?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.