Which is the measure of ab a. 10ft b. 15ft c. 20ft d. 100ft

C

Step-by-step explanation:

Since ΔABC is right use the sine ratio to find AB

sin30° = = , hence

sin30° = ( cross- multiply )

AB × sin30° = 10 ( divide both sides by sin30° )

AB = = 20 ft → C

b.an increase in a causes b to decrease

36/60

36/2=18

60/2=30

18/30

18/3=6

30/3=10

6/10

6/2=3

10/2=5

your final answer would be 3/5 of an

hope this !