My math teacher sucks, please help.

Concept: Rate of Change

We are told that the rate of change is 3x d/dx and we want to find the rate for 12 hours hence we do 12÷ 3 to get 4 hours You are told she babysat for 2 hours, each day for a total of 10 days = 20 hours. She earned 180 dollars so 180/20 hours = $9 per hour So you have a table and it tells you that for every quart you need 4 bags of tea. Hence for 24 bags we will get a result of 6 quarts of teaYou are told you have 35 total items between x= bottle and y= bars. You have 7 friends and each carry 3 water bottles = 21 water bottles. Hence 35-21= 14 bars Rate positively and give brainlist

The answer is:

∠

B

=

sin

−

1

(

20

⋅

sin

(

30

∘

)

15

)

You have to use the law of sines, just as you thought. This law is:

a

sin

∠

A

=

b

sin

∠

B

=

c

sin

∠

C

We only need the first equation here, let's fill in the numbers.

15

sin

(

30

∘

)

=

20

sin

∠

B

We use cross-multiplication, then we find:

sin

∠

B

=

20

⋅

sin

(

30

∘

)

15

then by taking the inverse sine, we find

∠

B

=

sin

−

1

(

20

⋅

sin

(

30

∘

)

15

)

Step-by-step explanation:

Hope it is helpful....