Write the complex number in rectangular form.9 cis 240°
A. 
- 
B. - 
+ 
C. - 
- 
D. 
- 
Answer: C
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Factor the polynomial completely.
- 
A. 
2
B. 
2
C. 
D. Prime
Use a negative-angle identity to write an equivalent trigonometric expression involving a positive angle.sin 
A. sin 
B. -sin 
C. cos 
D. 1 - sin 
Write the number 2,600 in scientific notation and in floating-point notation (as on a calculator). Round your answers to 1 decimal place. ? Enter the number in scientific notation. __________ ? The number in floating-point notation is __________ __________.
What will be an ideal response?
Solve.Police use the formula s = 
to estimate the speed s of a car in miles per hour, where d is the distance in feet that the car skidded and f is the coefficient of friction. If the coefficient of friction on a certain gravel road is 0.28 and a car skidded 340 feet, find the speed of the car, to the nearest mile per hour.
A. 293 mph B. 2856 mph C. 101 mph D. 53 mph