How would you set up this, {k(x) = bx and k(a) = 0.2, which option below gives the value of k(–3a)?} I don't know where the variables which represents a number goes.

Bruce is getting materials for a chemistry experiment his teacher gives him a container that has 0.25 liter of liquid in it.bruce need to use 0.4 of this liquid for the experiment. how much liquid will bruce use?

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²