Answer:
In a short way answer, it will be 8 miles per hour
In more conventional notation, ...
b(x) = -15x² +450x +325 . . . . 0 ≤ x ≤ 24
For 1990, x = 1990 - 1983 = 7
b(7) = -15·7² +450·7 +325 = 2740
The value of the card in 1990 was 2740.
I'm pretty sure it's 5 over 10! Hope I helped =)
Factors of 48 are 1,2,3,4,6,8,12,16,24,48.
True.
