The is the answer on my paper:
Define the variables: a is the number of apples I can buy g is the number of grapefruits I can buy.
Write the equation: 15 = 0.50a + 2g
The rate of change is (amount of the change) / (time it took to change) .
Amount of the change = (3 - 1) = 2 .
Rate of change = (2) / (time it took to change from 1 to 3) .
D=426-48(21)
I got 18 days.
So, D=18
Hope this helps! :)
D I think that’s the answer as dark chocolate takes longer to melt then white
