Determine whether the function is continuous or discontinuous at the given x-value.
?
?
A. continuous
B. discontinuous
Answer: B
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Solve the problem.A cab company charges a base rate of $1.50 plus 15 cents per minute. Let C(x) be the cost in dollars of using the cab for x minutes. Write a cost function.
A. C(x) = 1.50x + 0.15 B. C(x) = 0.15x + 1.50 C. C(x) = 1.50x - 0.15 D. C(x) = 0.15x - 1.50
Evaluate the second derivative of the function for the given value of x.f(x) = x4 + 2x3 - 3x + 1; x = -1
A. -5 B. 4 C. 0 D. 1
Solve the problem.In 1990, the population of a country was estimated at 4 million. For any subsequent year the population, P(t) (in millions), can be modeled by the equation 
where t is the number of years since 1990. Estimate the year when the population will be 21 million.
A. approximately the year 2088 B. approximately the year 2093 C. approximately the year 2016 D. approximately the year 2041
Find the sum of the series, if possible.3 + 12 + 48 + 192 + 768 + . . .
A. 1,000,001,023 B. 13,023 C. Not possible D. 1023