In 8 years i will be double the age i was 5 years ago

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.