What is the wave speed of a wave that has a frequency of 200 hz and a wavelength of 0.40 m?

Me n o w. i need t h i s. 10 points

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18