Neef answring these questions hurry need answers in a flash you so much

What is r i 4.5+10r=-6.5 with work pls

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.