A 450-room hotel is two-thirds filled when the nightly room rate is $80. Experience has shown that each $15 increase in cost results in 30 fewer occupied rooms. Find the nightly rate that will maximize income.
?
Please enter your answer as a number without the units.
Fill in the blank(s) with the appropriate word(s).
115
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Solve the problem.An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding water. How many quarts of water should be added to get a mixture that is 2% insecticide?
A. 319 quarts B. 119 quarts C. 219 quarts D. 19 quarts
Find the exact area of the surface obtained by rotating the given curve about the x-axis.
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Write a numerical expression for the phrase and simplify it.
more than the sum of - 
and 
A. 
+ 
; 
B. 
+ 
; 
C. 
+ 
; - 
D. 
+ 
; 
Solve the problem. Round your answer to the nearest tenth unless indicated otherwise.In a certain medium, sound travels at a speed of 6973 feet per second. How many meters per second does sound travel in this medium? Round to the nearest tenth.
A. 6345.4 m/s B. 2091.9 m/s C. 2719.5 m/s D. 22,871.4 m/s