Answer:
63
Step-by-step explanation:
Total groups: 21
number of students in each group: 3
total = 21 *3 =63
40/50 is the ratio because the cos formula is adjacent over hypotenuse and you can reduce it to 4/5 as a fraction :)
Answer:
2
Step-by-step explanation:
2 km per trip x 2 trips = 4 km
Answer:
- 150
Step-by-step explanation:
5×-30?-----) -150 is the answer