X^2·(x+9)·(x−5)≥0
what are all values of x

Step-by-step explanation:

x² ≥0 for all real values.

so we are concerned with (x+9)(x-5)≥0

x+9=0,x=-9

x-5=0,x=5

solution is values of x does not lie in these values.

so x≤-9 or x≥5

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.