Solve the problem.A golf ball moves according to the equation 
and y = 119t - 16t2, where distances are in feet and time is in seconds. Find the resultant velocity of the golf ball for 
A. 320 ft/s, 326.1°
B. 320 ft/s, 146.1°
C. 120 ft/s, 146.1°
D. 120 ft/s, 326.1°
Answer: D
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Determine whether the study is an experiment or an observational study.A pollster obtains a sample of students and asks them how they will vote on an upcoming referendum.
A. experiment B. observational study
Use a graphing calculator to solve the nonlinear system. Give x- and y-coordinates to the nearest hundredth.y = log(x + 7)y = x3
A. {(-2.50, 1.49)} B. {(2.07, 0.69)} C. {(-1.83, 1.64), (1.68, 2.16)} D. {(0.97, 0.90)}
State whether the vectors are parallel, orthogonal, or neither.v = 2i + j,
w = i - 2j
A. Parallel B. Orthogonal C. Neither
Solve. If necessary, round answers to the nearest tenth unless stated otherwise.A hot-air balloon exerts a 1100 lb pull B on a tether line at a 60° angle with the horizontal. Resolve the vector B into components.
A. Horizontal: 550 lb, vertical: 952.6 lb B. Horizontal: 1270.2 lb, vertical: 2200 lb C. Horizontal: 2200 lb, vertical: 1270.2 lb D. Horizontal: 952.6 lb, vertical: 550 lb