Convert.4.6 km = _____ mm
A. 4600
B. 46,000,000
C. 460,000
D. 4,600,000
Answer: D
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Find the angle between the vectors u and v.
A) 175°
B) 40°
C) 105°
D) 75°
E) 165°
Solve the problem.A baseball player hit a baseball with an initial velocity of 170 feet per second at an angle of 40° to the horizontal. The ball was hit at a height of 3 feet off the ground. Find parametric equations that describe the motion of the ball as a function of time. How long is the ball in the air? When is the ball at its maximum height? What is the horizontal distance the ball traveled?
A. x = 130.22t; y = -16t2 + 109.31t + 3; 6.804 sec; 3.416 sec; 886.017 feet B. x = 130.22t; y = -16t2 + 109.31t + 3; 6.859 sec; 3.416 sec; 893.179 feet C. x = 130.22t; y = -16t2 + 109.31t + 3; 6.859 sec; 3.416 sec; 1502.491 feet D. x = 130.22t; y = -16t2 + 109.31t + 3; 13.718 sec; 3.416 sec; 1786.358 feet
Solve the problem.The number of people present at a stadium holding a big rock concert can be estimated with the following function: 
where y is the number of people present and x is the amount of time after 
on the day of the concert. Predict the number of people present at 
A. 54,959 people B. 36,561 people C. 36,562 people D. 38,800 people
Find the acceleration vector in terms of ur and u?.r = a(9 - cos ?) and 
= 4
A. a = (16a( cos ? - a + a cos ?)ur + (32a sin ?)u? B. a = (16a( cos ? + 9a - a cos ?)ur - (32a sin ?)u? C. a = (81a( cos ? - 4a + a cos ?)ur + (162a sin ?)u? D. a = (16a( cos ? - 9 + cos ?)ur + (32a sin ?)u?