Account numbers for Northern Oil Company consist of five digits. If the first digit cannot be a 0, how many account numbers are possible?
A) 80,000
B) 800,000
C) 90,000
D) 10,000
C) 90,000
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Solve the problem.It took 1950 J of work to stretch a spring from its natural length of 1 m to a length of 
. Find the spring's force constant.
A. 1462.5 N/m B. 487.5 N/m C. 3900 N/m D. 975 N/m
Use your estimation skills to pick the most reasonable answer. Do not solve the problem.323.94 - 322.08
A. 186 B. 18.6 C. 1.86
Write the number in words.87,006,000,400,759
A. eighty-seven billion, six million, four hundred thousand, seven hundred fifty-nine B. eighty-seven trillion, six billion, four million, seven hundred fifty-nine C. eighty-seven trillion, six billion, four hundred thousand, seven hundred fifty-nine D. eighty-seven trillion, six million, four hundred thousand, seven hundred fifty-nine
Use the fundamental identities and appropriate algebraic operations to simplify the expression.
+ cos x sec x
A. csc2 x B. csc x C. sec2 x D. cot2 x