53, what is
20. In the xy-coordinate plane, lines m anu n are
perpendicular. If line m contains the points (0,0)
and (3, 1), and line n contains the points (2, 3) and
(1, a), what is the value of a?

Anyone know? will mark brainliest if correct

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m