Solve.While traveling in a car, the centrifugal force a passenger experiences as the car drives in a circle varies jointly as the mass of the passenger and the square of the speed of the car. If the a passenger experiences a force of 28.8 newtons when the car is moving at a speed of 20 kilometers per hour and the passenger has a mass of 80 kilograms, find the force a passenger experiences when the car is moving at 40 kilometers per hour and the passenger has a mass of 40 kilograms.
A. 64 newtons
B. 51.2 newtons
C. 80 newtons
D. 57.6 newtons
Answer: D
Mathematics
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Solve the problem.Find the 16th triangular number that corresponds to the following dot sequence. 
A. 136 B. 257 C. 120 D. 128
Mathematics
If n is an integer, n ? 180° represents an integer multiple of 180°, and 
represents an odd integer multiple of 90°. Decide whether the expression is equal to 0, 1, -1, or is undefined. tan(n ? 180°)
A. 0 B. Undefined C. 1 D. -1
Mathematics
Solve the following equation for x.-47
+ x = - 24
A. 22
B. 23
C. 23
D. 22
Mathematics
Solve the system by elimination.
What will be an ideal response?
Mathematics