Name: 19. (1 point) The height of a mass attached to a spring can be modelled by the sinusoidal function
h(t)=84-6.7cos24.8t
where
h(t)
represents the height in centimetres and
t
represents the time in seconds. What is the height of the mass after 10 s ? A. 77.4 cm B. 84.0 cm C. 86.9 cm D. 90.6 cm