?What percent of a present amount of radioactive radium 
will remain after 900 years? The half-life of radium is 1,600 years.
?
A. ?45%
B. ?25%
C. ?65%
D. ?68%
Answer: D
Mathematics
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State how many peaks you would expect for the distribution described.Number showing when a single die is rolled 100 times
A. None B. Three C. Two D. One
Mathematics
Factor completely. If the polynomial is prime, state this.48a4 - 75b2
A. (12a2 + 15b)(4a2 - 5b) B. 3(4a2 + 5b)2 C. 3(4a2 + 5b)(4a2 - 5b) D. 3(4a2 - 5b)2
Mathematics
Find the probability.Each of ten tickets is marked with a different number from 1 to 10 and put in a box. If you draw a ticket from the box, what is the probability that you will draw 4, 7, or 3?
A. 
B. 
C. 
D. 
Mathematics
Use an integer to express the number.One country exported $85,600,000 more than it imported, giving it a positive trade balance.
A. -85,600,000 B. 85,600,000
Mathematics