. Given that 68% of the students scored between 1000-2400 on an entrance exam, calculate the standard deviation (assuming this is a normal distribution).​

Find the power series expantion of f(z)=log(4=3z) at the point z=-1

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

Jalen charges $25.50 for every 3 hours of yard work he does for his neighbors. ralph charges $34 for every 4 hours of work that he does. who charges less? opinions: 1.they charge the same amount 2.jalen 3.ralph