The correlation coefficient r between the size of a lake in square miles, x, and the yearly number of registered boaters, y, is 0.7453. what percent of the variation in the number of yearly boaters can be explained by differences in lake sizes - ( a. 74.3% ) (b. 55.2%) (c. 44.8%) (d. 37.2%)

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m