Holly burns 681 calories walking briskly for 3 h.

at this rate, how many calories does she burn in one hour?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

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

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?