Fill in the blank with one of the words listed below.
The horizontal number line in the rectangular coordinate system is called the 
.
A. x-axis
B. y-intercept
C. x-intercept
D. y-axis
Answer: A
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Solve the problem and write the answer using scientific notation.A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles per second.
A. 5.86 × 107 miles B. 5.86 × 1012 miles C. 5.86 × 105 miles D. 5.86 × 1014 miles
Find the prime factorization.5552
A. 152 ? 372 B. 52 ? 372 C. 34 ? 372 D. 32 ? 52 ? 372
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
Solve the problem.The temperature at 5:00 was -7° C. Four hours later, it was -11° C. What was the change in temperature?
A. 18° C B. 4° C C. -18° C D. -4° C