Solve the equation for the indicated variable. (Leave ± in your answer, when appropriate.)A = 
?r2 for r
A. r = 
B. r = ± 
C. r = ± 
D. r = 3
Answer: C
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Provide an appropriate response.Suppose that A is an m × n matrix and B is a p × q matrix. Under what condition(s) can the product AB be found? Under what condition(s) can the product BA be found?
A. AB can be found if m = p; BA can be found if n = q. B. AB can be found if q = m; BA can be found if n = p. C. AB can be found if m = q and n = q; BA can be found under the same conditions. D. AB can be found if n = p; BA can be found if q = m.
Find a parametrization for the line segment beginning at P1 and ending at P2.P1(0, 0, 0) and P2(4, 3, -4)
A. x = 4t - 4, y = 3t - 3, z = -4t + 4 B. x = 4t + 4, y = 3t + 3, z = -4t - 4 C. x = 4t, y = 3t, z = -4t D. x = -4t, y = -3t, z = 4t
Perform the indicated operation. Write the answer in scientific notation.(4.3 × 104)(2.2 × 105)
A. 9.46 × 109 B. 956 × 1018 C. 9.56 × 109 D. 946 × 107
Solve the problem.A projectile is fired with an initial velocity of 450 feet per second at an angle of 45° with the horizontal. To the nearest foot, find the maximum altitude of the projectile. The parametric equations for the path of the projectile are x = (450 cos 45°)t, and y = (450 sin 45°)t - 16t2.
A. 1574 ft B. 1598 ft C. 1565 ft D. 1582 ft