Find the sum.-20 + [12 + (-13)]
A. 5
B. -21
C. 45
D. 19
Answer: B
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Arrange the fractions in ascending order. Or, if the fractions are equivalent, answer "Equivalent".
, 
, 
A. 
, 
, 
B. 
, 
, 
C. 
, 
, 
Change the logarithmic expression to an equivalent expression involving an exponent.logb 49 = 
A. 492/3 = b
B. 
b = 49
C. b3/2 = 49
D. b2/3= 49
Find the numerical value of the expression for 
and 
(Round to the nearest thousandth.)
A. a) 1.802 b) 8.110 B. a) 0.612 b) 2.753 C. a) 42.884 b) 868.400 D. a) 7.209 b) 145.978
Solve the problem.Ron throws a ball straight up with an initial velocity of 40 feet per second from a height of 7 feet. 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 maximum height of the ball?
A. x = 0; y = -16t2 + 40t + 7; 5.328 sec; 1.25 sec; 25 feet B. x = 0; y = -16t2 + 40t + 7; 4.621 sec; 1.25 sec; 177.892 feet C. x = 0; y = -16t2 + 40t + 7; 2.311 sec; 1.25 sec; 6.988 feet D. x = 0; y = -16t2 + 40t + 7; 2.664 sec; 1.25 sec; 32 feet