Could someone help me, please? :)

How many grams are in 8 kilograms? if 100 grams = 1 kilogram

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have