Which polynomial function has a leading coefficient of 1 and roots (7 + 1) and (5-1) with multiplicity 1? O f(x) = (x + 7)(x - 1)(x + 5)(x + 1)

O f(x) = (x - 7)(x - 1)(x - 5)(x + 1)

O f(x) = (x -(7 - 1)(x - (5+)(x -(7 + 1)(x - (5-))

Of(x) = (x + (7 - 1)(x + (5 + 1)(x + (7 + 1)(x + (5-))

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

at right angles to each other