find bc. round to the nearest tenth. a. 19.1 b. 20.8 c. 23.1 d. 23.3

We can use the sine rule for this problem.

Sine rule formula is:

Where a (side BC), b (side AC) and c (side AB) are the opposite sides of the angle A, B and C repectively.

According to the given figure,

B= 79°, C = 30° and AB= c =11 and we need to find side BC= a.

Hence, first step is to find the angle A.

Sum of all angles of a triangle is 180°.

So, ∠A +∠B + ∠C = 180.

∠A + 79 + 30 = 180

∠A + 109 = 180

∠A = 180 - 109

∠A = 71°.

So, let's use the formula:

So, a = 20.801

Therefor BC is 20.8 ( Rounded to nearest tenth).

"Hope this helps!!"

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

step-by-step explanation: