Multiply .035 times a power of ten so that the product is greater than 1 but less than 100

Anyone know? will mark brainliest if correct!

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

Will give brainliest b. describe the function over each part of its domain. state whether it is constant, increasing, or decreasing, and state the slope over each part.