Joan stayed at South Africa from 3rd January 2004 and left on 20th march the same year for how many nights did she spend in South Africa​

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.