Joyce and Marvin run a day care for preschoolers. They are trying to decide what to feed the children for lunches. They
would like to keep their costs down, but also need to meet the
nutritional requirements of the children. They have already
decided to go with peanut butter and jelly sandwiches, and some
combination of graham crackers, milk, and orange juice. The
nutritional content of each food choice and its cost are given in the
table below.
The nutritional requirements are as follows. Each child should
receive between 400 and 600 calories. No more than 30 percent of
the total calories should come from fat. Each child should consume
at least 60 milligrams (mg) of vitamin C and 12 grams (g) of protein. Furthermore, for practical reasons, each child needs exactly
2 slices of bread (to make the sandwich), at least twice as much
peanut butter as jelly, and at least 1 cup of liquid (milk and/or
juice).
Joyce and Marvin would like to select the food choices for each
child which minimize cost while meeting the above requirements.
(a) Formulate a linear programming model for this problem.
(b) Solve this model by the simplex method.

Match the given situations to the type of risks that a business may face while taking credit.(there's not just one answer)1. beta ltd. had taken a loan from a bankfor a period of 15 years, but its salesare gradually showing a decline.2. alpha ltd. has taken a loan for increasing its production and sales,but it has not conducted any researchbefore making this decision.3. delphi ltd. has an overseas client. the economy of the client’s country is going through severe recession.4. delphi ltd. has taken a short-term loanfrom the bank, but its supply chain logistics are not in place.a. foreign exchange riskb. operational riskc. term of loan riskd. revenue projections risk

Leon and sara are arguing over when the best time is to degrease soup. leon says that it's easiest to degrease soup when it's boiling. sara says it's easiest to degrease soup when it's cold. who is correct? a. neither leon nor sara is correct. b. leon is correct. c. both leon and sara are correct. d. sara is correct. student b   incorrect which following answer correct?

Reliability and validity reliability and validity are two important considerations that must be made with any type of data collection. reliability refers to the ability to consistently produce a given result. in the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways. unfortunately, being consistent in measurement does not necessarily mean that you have measured something correctly. to illustrate this concept, consider a kitchen scale that would be used to measure the weight of cereal that you eat in the morning. if the scale is not properly calibrated, it may consistently under- or overestimate the amount of cereal that’s being measured. while the scale is highly reliable in producing consistent results (e.g., the same amount of cereal poured onto the scale produces the same reading each time), those results are incorrect. this is where validity comes into play. validity refers to the extent to which a given instrument or tool accurately measures what it’s supposed to measure. while any valid measure is by necessity reliable, the reverse is not necessarily true. researchers strive to use instruments that are both highly reliable and valid.