Awave has a wavelength of 12 mm and a frequency of 6 hertz. what is its speed?

explanation:

i think option no d is the correct answer

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary