Answer:
The amplitude of the sinusoidal function is 3
Step-by-step explanation:

Answer:
John needs 217 tiles.
Rate of change is 1.9 tiles per square foot
Step-by-step explanation:
Hallway area=3•38=114 ft²
Rate of change=190/100=1.9 tiles/ft²
Tile total=
T=area•rate
=114•1.9
T=216.6
(Round up because tiles are sold as whole units)
Total tiles=217
0.5 to the fourth power equals 0.0625.
(190,258.50 + 152,698.00 + 122,753.00 + 220,523.00 + 231,951.00) : 5 = 183,636.70 - answer.