Answer :

Step-by-step explanation :
To find the product of

First we expand the bracket ,
it implies that, we use the expression outside the bracket to multiply individual expressions inside the bracket.
Hence


we now apply the law of indices

meaning, when you are multiplying two expressions with the same bases , repeat one of the bases and add the exponents.
Then, simplify to obtain
(r - s)³ + r²
= (-3 - (-4))³ + (-3)²
= (-3 + 4)³ + 9
= 1³ + 9
= 1 + 9
= 10
<span>If it decreases by 12 percent, you do 19,200x.12 which is 2,304. You subtract that from 19,200 which is 16,896. You multiply that by .12 which is 2,027.52 and subtract that from 16,896 which is 14,868.42. You do that three more times and there's your answer.
</span>
6
84
91
395
All these are rounded to the nearest whole number
cosine 122.2 = <em>-</em><em>0</em><em>.</em><em>5</em><em>3</em><em>2</em><em>8</em><em>7</em><em>6</em><em>2</em><em>7</em><em>6</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>