The tangent line is perpendicular to the radius, so will have slope
.. -1/2.5 = -0.4 . . . . . . corresponding to the 3rd selection
C= 1.50t * 12.50
The slope of the line is the cost of each topping. Because each individual topping is $1.50, you will multiply it by t (the number of toppings).
<span>Common difference is just the number you pick minus the previous number,
You have </span><span>6, 9.4, 12.8, 16.2, . . .
d=9.4-6=3.4
d=12.8-9.4=3.4
The common difference is 3.4</span>
Answer:
Answer is in the attached file.
The answers are -2.5 - 3.5n and -2.5 - n(5 - 1.5). Hope that helps!