Evaluate the expression with the given replacement values.-2x3y; x = 2 and y = -6
A. 96
B. 72
C. 48
D. -96
Answer: A
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Provide an appropriate response.A baseball is hit when it is 2.7 feet above the ground. It leaves the bat with an initial speed of 151 ft/sec, making an angle of 22° with the horizontal. Assuming a drag coefficient 
how high does the ball go, and when does it reach maximum height? For projectiles with linear drag: x = x0 + 
(1 - e-kt) cos ?, y = y0 + 
(1 - e-kt) sin ? + 
style="vertical-align: -21.0px;" />(1 - kt - e-kt)where k is the drag coefficient, v0 and ? are the projectile's initial speed and launch angle, and g is the acceleration of gravity (32 ft/sec2). A. Maximum height = 8.27 feet; time to maximum height = 0.74 sec B. Maximum height = 3.03 feet; time to maximum height = 0.06 sec C. Maximum height = -0.23 feet; time to maximum height = -0.21 sec D. Maximum height = 3.07 feet; time to maximum height = 0.02 sec
Evaluate the expression.cos 0° - 3 sin 90°
A. -3 B. -2 C. 0 D. 1
Simplify.
÷ 
? 
A. 
B. 
C. 8
D. 6
Solve the problem using the vector form v = 
[(cos ?)i + (sin ?)j].An airplane flies 10° for 180 mi, and then 315° for 95 mi. How far is the plane from the starting point, and in what direction?
A. 247 mi, 352° B. 275 mi, 2° C. 275 mi, 307° D. 247 mi, 307°