One safe investment pays 10% per year, and a more risky investment pays 18% per year. A woman who has $145,400 to invest would like to have an income of $20,000 per year from her investments. How much should she invest at each rate?
?
A. She should put $40,712 in the safe investment and $26,172in the risky investment.?
B. She should put $18,175 in the safe investment and $32,715 in the risky investment.
C. She should put $14,540 in the safe investment and $104,688 in the risky investment.
D. She should put $77,150 in the safe investment and $68,250 in the risky investment.
E. She should put $47,982 in the safe investment and $40,712 in the risky investment.
Answer: D
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Use the two steps for solving a linear programming problem to solve the problem.A chemical company must use a new process to reduce pollution. The old emits 7 g of sulphur and 14 g of lead per liter of chemical made. The new emits 2 g of sulphur and 3.5 g of lead per liter of chemical made. The company makes a profit per liter of 
under the old and 
under the new. No more than 13,701 g of sulphur and no more than 10,598 g of lead can be emitted daily. How many liters of chemical could be made under the old and under the new to maximize profits? Let x represent the
number of liters produced under the old process and y represent the number of liters produced under the new process. A. 0 liter(s) under old process and 3028 liter(s) under new process B. 0 liter(s) under old process and 2928 liter(s) under new process C. 1093 liter(s) under old process and 2928 liter(s) under new process D. 3028 liter(s) under old process and 1093 liter(s) under new process
Determine the period of the given function.y = -3 sin x
A. 2?
B. 
C. 3
D. ?
Let 
with A in QII and 
with B in QIII.
?
Find 
.
?
A. 
B. 
C. 
D. 
E. 
Graph the inequality.xy ? 2 
A. 
B. 
C. 
D. 