
3*boys=2*18
3*boys=36
boys=12
12+18=30
total number of students: 30
Volume = (1/3) * base area * height
= 1/3 * 24 * 18
= 144 ft^3
Plotting the data to get the line of best fit, it is:
y<span> = 0.087</span>x<span> + 0.587
substitute x=2030-1980=50,
y = $4.94 is the price in 2030</span>