Determine whether the situation calls for a survey, an observational study, or an experiment.
you want to find out if years of jogging has an effect on cardiovascular health.

Step-by-step explanation:

This situation calls for an observational study.  Unfortunately, cardiovascular health is difficult to measure unless one defines some "health scale" so that health could be roughly quantitized.

step-by-step explanation:

yes

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47