What is the standard deviation for the data set?

138, 129, 145, 134, 142, 159, 153, 142, 127

express your answer as a decimal to the nearest tenth.

enter your answer in the box.

p. s: not actually asking just for those with the same question.

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?

Answer this question i need as soon as possible

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.