Solve the problem.The level of a sound in decibels (db) is determined by the formula 
where I is the intensity of the sound in watts per square meter. What is the intensity of a noise measured at 53 db? Express the answer in scientific notation, rounded to two decimal places.
A. 2.00 × 10-7 watt/m2
B. 2.00 × 1014 watt/m2
C. 5.30 × 10-10 watt/m2
D. 2.00 × 10-6 watt/m2
Answer: A
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Increasing the down payment on a mortgage reduces both the size of the monthly payments and the total interest paid. Calculate the reduction in the monthly payment by increasing the down payment by the amount specified, and the amount saved on interest over the life of the loan. Assume the mortgage is for 20 years and use the table to find the monthly payments. 
A. $71.60, $17,184.00 B. $83.60, $20,064.00 C. $96.50, $23,160.00 D. $73.40, $17,616.00
Solve the problem.Which of the following investments would not be considered a primary asset class?
A. precious metals B. stock swaps C. cash D. real estate
Provide an appropriate response.Identify the intervals where f'(x) > 0.
Fill in the blank(s) with the appropriate word(s).
In a laboratory experiment, two separate foods are given to experimental animals. Each food contains essential ingredients, A and B, for which the animals have a minimum requirement, and each food also has an ingredient C, which can be harmful to the animals. The table below summarizes this information. ? Food 1 Food 2 Required Ingredient A 10 units/g 3 units/g 33 units Ingredient B 6 units/g 15 units/g 33 units Ingredient C 5 units/g 1 unit/g ? Determine how many grams of foods 1 and 2 should be given in order to satisfy the requirements for A and B while minimizing the amount of ingredient C ingested. Also determine the minimum amount of ingredient C ingested. Round your answer to one decimal place if necessary. ?
A. 11 grams of food 1 and 0 gram0 of food 2 satisfy the minimum requirements for A and B while minimizing the amount of ingredient C to 11 grams. B. ?0 gram0 of food 1 and 11 grams of food 2 satisfy the minimum requirements for A and B while minimizing the amount of ingredient C to 11 grams. C. ?12 grams of food 1 and 0 gram0 of food 2 satisfy the minimum requirements for A and B while minimizing the amount of ingredient C to 60 grams. D. ?1 gram0 of food 1 and 11 grams of food 2 satisfy the minimum requirements for A and B while minimizing the amount of ingredient C to 16 grams. E. ?2 grams of food 1 and 11 grams of food 2 satisfy the minimum requirements for A and B while minimizing the amount of ingredient C to 21 grams.