I need the correct verb form in present tense for the phrase "...the cost and size of... decrease". When I google "as the cost and size of" or smth like that, both forms in present can be found: plural and singular.
As the cost and size of devices falls<br> As the cost and size of the sensors continue to...
I hope that the use of plural is more correct in this case, but I see also that the common definite article may influence it.
It is for a scientific paper which is written in English (US) addressed globally.