Can standard deviation be negative

A circular mirror has a diameter of 12 inches what is the are in square inches of the mirror?

In, 2003 the population of an African country was about 20 million people, which is 2 million more than 4 times the population in 1950 Solve the equation to find approxomate population p (in millions) in 1950

What fraction of the total number of breakfast treats is the number of muffins? There is 50 total treats, 5 dounuts to 45 muffins ...

What is the value of 3 (2p + 4R) when P = 0.8 and R = 1.5

Vinnie decorated 72 cookies in 36 minutes how many cookies did he decorate per minute

What fraction is equivalent to 5.1? is 5.1 a rational number?

Natalie has a choice of three breads, five choices of meats, and four choices of cheese to make a sandwich. how many different sandwiches can she make?

What is the area of this triangle 12 inches and 3 inches

Write as an expression and simplify: the tripled product of 6a and b^2

What does n equals when 10 = - 8+n divided by 4