An enclosed gas exerts a pressure p on the walls of a container. this pressure is directly proportional to the temperature t of the gas, measured in kelvin. if the pressure is 7 lb per square inch when the temperature is 420°k, find the constant of variation.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio