Simplify the expression. Assume all variables represent positive numbers.
+ 
- 
A. 
B. 
C. 
D. 
Answer: A
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Find the standard quota asked for. Round your answer to two decimals.A school district receives a grant to purchase 44 new computers to be apportioned among the 6 schools in the district based on the student population of each school. The student populations are given in the following table. 
Find the standard quota for school A.
A. 8.81 B. 10.17 C. 11.11 D. 11.58
The cost of controlling emissions at a firm goes up rapidly as the amount of emissions reduced goes up. Here is a possible model.
?
?
where x is the reduction in sulfur emissions, y is the reduction in lead emissions (in pounds of pollutant per day), and C is the daily cost to the firm (in dollars) of this reduction. Government clean-air subsidies amount to $300 per pound of sulfur and $50 per pound of lead removed. How many pounds of pollutant should the firm remove each day to minimize the net cost (cost minus subsidy)?
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Enter your answer as an ordered pair in the form 
. Round your answer to three decimal places if necessary.
What will be an ideal response?
Prove the following statement directly from the definitions of the terms. Do not use any other facts previously proved in class or in the text or in the exercises
For all rational numbers r, and s, if s ?= 0, then 2r/5s is a rational number.
Solve the problem.Find the amount in a savings account at the end of 9 years if the amount originally deposited is $9000 and the interest rate is 7% compounded semiannually.Use: A = P
ntwhere:A = final amountP = $9000 (the initial deposit)r = 7% = 0.07 (the annual rate of interest)n = 2 (the number of times interest is compounded each year)t = 9 (the duration of the deposit in years)
A. $18,389.14 B. $16,717.40 C. $12,266.08 D. $167,670.00