The data set shown has a mean of 34 and a standard deviation of 9.
{20, 22, 24, 28, 33, 35, 38, 40, 42, 45, 47)
How many of these data points
have a z-score less than 0.7?

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]