Solve the problem.Roberto invested some money at 6%, and then invested $2000 more than twice this amount at 10%. His total annual income from the two investments was $3840. How much was invested at 10%?
A. $30,000
B. $6000
C. $28,000
D. $3000
Answer: A
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Find the limit of the sequence or determine that the limit does not exist.an = 
n
A. does not exist B. 0 C. e7 D. 7
Solve the problem.Find the average rate of change. Use appropriate units.
Minutes Cellular Phone is Used
A. $0.40 per minute B. $-2.40 per minute C. $0.90 per minute D. $-0.42 per minute
A. 8x5
B. x5
C. 8x10
D. 64x5
Solve.A ball is thrown downward with an initial velocity of 14 meters per second from a cliff that is 
high. The height of the ball is given by the quadratic equation 
where h is in meters and t is the time in seconds since the ball was thrown. Find the time it takes the ball to hit the ground. Round your answer to the nearest tenth of a second.
A. 1.4 sec B. 2.4 sec C. 1.5 sec D. 1.3 sec