Explain why area and density called derived quantities

units of derived quantities
a given derived quantity, such as area, is always expressed in the same type of units. for example, area is always expressed in squared units, such as cm2 or m2. a: the derived quantity is density, which is mass (kg) divided by volume (m3).

Answer: fn = wcos50 = 38.89(9.81)(cos50) = 245.23 n

Answer (d) valerie rides her bike south at 8 kilometers per hour///owen jogs south at 8 kilometers per hour ;

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !