Find the part.0.4% of 2000 trees
A. 80 trees
B. 800 trees
C. 0.8 trees
D. 8 trees
Answer: D
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Solve the equation.-7a + 3 + 8a = 10 - 21
A. {-34} B. {14} C. {34} D. {-14}
Answer the question asked. When necessary, round to the nearest hundredth.A car travels 400 miles on level terrain in the same amount of time it travels 160 miles on mountainous terrain. If the rate of the car is 30 miles per hour less in the mountains than on level ground, find its rate in the mountains.
A. 50 mph B. 80 mph C. 40 mph D. 20 mph
Find any modes that exist.9.6, 10, 7.8, 10, 7.6
A. 10 B. 7.5 C. 9 D. 9.6
Richter scale Use the formula 
In October 2004, an earthquake measuring 6.8 on the Richter scale occurred in Japan. The largest quake in Japan since 1990 was one in 1993 that registered 7.7. How many times more severe was the 1993 shock than the one in 2004 on the Richter scale?
a. 0.6 times as severe b. 4.4 times as severe c. 7.9 times as severe d. 8.3 times as severe e. 11 times as severe