Which type of theory guides intervention development?

According to Glanz & Bishop (2010) why is it important to use theory in health-promotion interventions?

Which type of theory describes why a problem exists?

The pharmacy’s recipe book provides a formula that yields 15 g of an ointment. You are asked to prepare a 90 g jar of the ointment. By what number do you need to divide each ingredient to make the desired formula?

You need to prepare a compound of medication using 12 g of active ingredient in 60 g of a cream base. What is the percentage strength of this compounded preparation?

You need to prepare a compound of a medication with a concentration of 15%. How many grams of the medication will be in 150 g of the final product?

You need to prepare 75 g of a 15% ointment using a 20% and a 5% ointment. How many grams of each ointment will you need?

A pharmacy’s recipe book provides a formula that yields 100 g of an ointment. You are to prepare 75 g of the ointment. The formula calls for 4 g of Drug A, 2 g of Drug B, 4 g of Drug C, and 90 g of Petrolatum Base Ointment. How much of each ingredient will you need?

You need to prepare 50 g of a 35% ointment using a 40% and a 20% ointment. How many grams of each ointment will you need?

A pharmacy’s recipe book provides a formula that yields 10 mL of a drug solution. You are to prepare 30 mL of the solution. The formula calls for 3 mL of Drug A, 1 mL of Drug B, and distilled water QSAD to 10 mL. How much of each ingredient will you need?