Xerostomia meaning
Xerostomia, also known as dry mouth, is a condition in which the salivary glands in your mouth don't make enough saliva to keep your mouth wet. It can result from various factors, including medication side effects, medical conditions like Sjogren's syndrome, or radiation therapy for cancer. Symptoms include a dry, sticky mouth, difficulty swallowing, and an increased risk of dental problems. Treatment focuses on relieving symptoms and may involve saliva substitutes, medications to stimulate saliva production, and good oral hygiene practices.
Xerostomia meaning: Explanation, Formulae and Practice
These topics connect maths with money decisions. Always identify cost price, selling price, principal, rate and time before using a formula.
Practical Formulae
- Profit = selling price - cost price.
- Loss = cost price - selling price.
- Profit percentage = (profit / cost price) x 100.
- Simple interest = (principal x rate x time) / 100.
- Amount = principal + interest.
Solved Example
Question: An item is bought for Rs. 500 and sold for Rs. 575. Find the profit percentage.
Working: Profit = 575 - 500 = 75. Profit percentage = (75 / 500) x 100.
Result: Profit percentage = 15%.
Unanswered Practice Questions
Try these yourself before checking notes or calculators.
- Find the loss percentage when CP is Rs. 800 and SP is Rs. 720.
- Find simple interest on Rs. 5,000 at 8% per year for 2 years.
- A shopkeeper marks an item at Rs. 1,200 and gives 10% discount. Find the selling price.
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