A photographer wants to use a scale factor of 2.5 to enlarge a picture. What will the area of the picture be after it is enlarged

Can someone me and do the problem plz so i can understand it more better

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?