Solve the problem.Linda invests $25,000 for one year. Part is invested at 5%, another part at 6%, and the rest at 8%. The total income from all 3 investments is $1600. The income from the 5% and 6% investments is the same as the income from the 8% investment. Find the amount invested at each rate.
A. $8000 at 5%, $10,000 at 6%, and $7000 at 8%
B. $10,000 at 5%, $10,000 at 6%, and $5000 at 8%
C. $5000 at 5%, $10,000 at 6%, and $10,000 at 8%
D. $10,000 at 5%, $5000 at 6%, and $10,000 at 8%
Answer: D
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Solve the problem.The height h in feet of a frisbee thrown is given by 
, where x is the time traveled in seconds. The frisbee is released at a height of 
At what time will the height of the frisbee be 
again? (Round your answer to the nearest tenth of a second, if necessary.)
A. 5.1 sec B. 12.5 sec C. The height of the frisbee will never be 3 feet again. D. 10.1 sec
Solve the problem.Of all possible pairs of positive numbers having a sum of 72, which pair has the maximum product?
A. 26 and 46 B. 36 and 36 C. 27 and 45 D. 35 and 37
Add.-3 + (-10) + (-24) + (-7)
A. -18 B. -44 C. 10 D. -38
Find the square root.
A. -7 B. 7 C. -24 D. Not a real number