Determine if the equation is true or false.cos 
= cos 
A. True
B. False
Answer: A
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The life expectancy E, in solar lifetimes, of certain stars depends on their mass M, in solar masses. The relationship is
.
Does an increase in mass have a greater effect on life expectancy for a larger star or a smaller star? A graph of E versus M? can help you answer this question.
What will be an ideal response?
Find the value of the expression.8[-4 + 2(-6 + 5)]
A. 12 B. -34 C. 16 D. -48
Solve.Two pipes can be used to fill a pool. Working together, the two pipes can fill the pool in 
The larger pipe can fill the pool in 2 hours less time than the smaller pipe can alone. Find the time to the nearest tenth of an hour it takes for the smaller pipe working alone to fill the pool.
A. 5.2 hr B. 7.2 hr C. 5.3 hr D. 7.3 hr
Use the Urban Prices Index Table to answer the question. The table shows what $100 worth of an item costs today. 
*All figures are expressed as a percent of the base of 100 from two decades ago.Urban area: New YorkWhat does $100 of Recreation cost today?
A. $117.10 B. $189.70 C. $200.30 D. $115.50