Assume that 0 < x < pi/2 and 0 < y < pi/2. Find the exact value of sin(x-y) if sin x = 4/9 and sin y = 1/4

Me with this one question, and i'll upvote the brainliest answer

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?