If an astronomer's hypotheses provide a calculus consistent with the observations,
A. the astronomer's work is sufficient.
C. the present author is wrong.
B. the astronomer's work is faulty.
D. the observations are wrong.

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?