The directions to knit a blanket say to buy an extra 15% of yarn to account for error. Chloe needs 7.5 yards of yarn to make the blanket. How much yarn should she buy? PLEASEEE HELP !!!

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

What is the simplified form of square root of 400 to the 100th power ?

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no. explain your mathematical thinking