Solve the problem.In September 1998 the population of the country of West Goma, in millions was modeled by 
At the same time the population of East Goma, in millions was modeled by 
In both formulas x is the year, where 
corresponds to September 1998. Assuming these trends continue, estimate what the population will be when the populations are equal.
A. 1 million
B. 17 million
C. 18 million
D. 19 million
Answer: D
Mathematics
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Find the curvature of the curve r(t).r(t) = (10 + ln(sec t))i + (4 + t)k, -?/2 < t < ?/2
A. ? = -cos t B. ? = 1 - cos t C. ? = cos t D. ? = sin t
Mathematics
Use the given vectors to find the specified scalar.u = 7i + 9j and v = -14i - 7j; Find u ? v.
A. -98 B. -63 C. -35 D. -161
Mathematics
Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent if necessary.Continental Tools bought a new computer system. To pay for the system, they borrowed $36,060 at 
interest for 195 days. Find the interest owed. (Use a 365 day year.)
A. $1051.75 B. $2119.14 C. $2247.58 D. $4207.00
Mathematics
Solve the equation.r2 + 9 = -6r
A. 3 B. -3, 3 C. 0, -3 D. -3
Mathematics