Solve the application by adding or subtracting appropriately. Answer with a complete sentence.Carlos's grocery bill was $9.71. He gave the clerk a $20 bill. How much change should he receive?
A. He should receive $10.29 change.
B. He should receive $9.29 change.
C. He should receive $9.71 change.
D. He should receive $10.28 change.
Answer: A
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Find the unit tangent vector of the given curve.r(t) = (4 - 2t)i + (2t - 9)j + (10 + t)k
A. T(t) = 
i - 
j - 
k
B. T(t) = - 
i + 
j + 
k
C. T(t) = 
i - 
j - 
k
D. T(t) = - 
i + 
j + 
k
Subtract.1.6 - 0.0004
A. 1.6096 B. 1.9996 C. 1.596 D. 1.5996
Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives a defective item of this product as a gift. What is the probability it came from store B?
A. 0.275 B. 0.22 C. 0.5667 D. 0.7083
Find the percent. Round to the nearest tenth of a percent.270 cities is what percent of 1880 cities?
A. 0.1% B. 14.4% C. 696.3% D. 0%