A person buys a phone for $81 and signs up for a single-line phone plan with 2000 monthly anytime minutes. The plan costs $119.92 per month. Write an equation that can be used to determine the total cost, C(t), of this phone plan for t months. Then, find the cost for 23 months, assuming that the number of minutes the person uses does not exceed 2000 per month.

17 in long 1.3 ft wide and 8in high what is the volume

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points