Determine the magnitude of the particle's velocity at the instant t=1. 5 s. The position of a particle is described by Express your answer to three significant figures and include the appropriate units. r=(300e−⁰⁵ᵗ)mm and θ=(0. 3t²) rad, where t is in seconds. * Incorrect; Try Again; 3 attempts remaining Part B Determine the magnitude of the particle's acceleration at the instant t=1. 5 s. Express your answer to three significant figures and include the appropriate units.