Solve.A boat sailed a distance of 21 kilometers due south. It then banked to the left and sailed the second leg of the journey. Finally, it banked left again and sailed back to the starting point. The entire course was shaped like a right triangle with the 21-kilometer distance serving as the hypotenuse. The second leg of the journey was 7 kilometers longer than the final leg. How long were the second and third legs of the journey? Round your answers to the nearest hundredth of a kilometer, if necessary.
A. The second leg was 21.43 kilometers. The third leg was 7.43 kilometers.
B. The second leg was 9.38 kilometers. The third leg was 5.88 kilometers.
C. The second leg was 17.93 kilometers. The third leg was 10.93 kilometers.
D. The second leg was 18.76 kilometers. The third leg was 11.76 kilometers.
Answer: C
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Solve the problem.A video rental company charges $5 per day for renting a video tape, and then $4 per day after the first. Use the greatest integer function and write an expression for renting a video tape for x days.
A. y = 
B. y = 4
+ 5
C. y + 5 = 4
D. y = 4x + 5
Fill in the blank with one of the words or phrases listed below.
The sign "<" means 
and ">" means 
.
A. is less than, is greater than B. negative, positive C. positive, negative D. is greater than, is less than
Insert the decimal point in the appropriate place.
A. 
B. 
C. 
D. 
Graph the equation.h(x) = -x2 + 8x - 16
A. 
B. 
C. 
D. 