Suppose that research has shown that the probability that a missile penetrates enemy defenses and reaches its target is 0.2. Find the smallest number of identical missiles that are necessary in order to be 50% certain of hitting the target at least once.
?
__________ missiles
Fill in the blank(s) with the appropriate word(s).
Answer: 4
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (6 ln(9t))i + (3t3)j
A. a = 
t-2i + 18tj
B. a = - 
i + 18tj
C. a = 
i + 9tj
D. a = - 
t-2i + 18tj
Give the appropriate form of the partial fraction decomposition.
A. 
+ 
+ 
B. 
+ 
+ 
C. 
+ 
D. 
+ 
+ 
Choose the most reasonable measurement for the situation described.Ivan measured the length of a hammer. What is the most likely measurement?
A. 33 cm B. 33 m C. 33 mm D. 33 km
Solve.On a map, the length of a nature-center trail is 6.3 cm. If the scale is 1 cm to 39 km, what is the actual length of the trail? Round your answer to the nearest tenth, if necessary.
A. 491.4 km B. 246.7 km C. 245.7 km D. 249.7 km