LQQ#2 Sodium-24 has a half-life of 15 hours. How many grams of a 450 g sample will remain after 45
hours?

Which of the following parabolas opens down?

How do you find percent change? ? i will give brainliest for the bestme i don’t understand

Solve this problem by using a 5d process or writing and solving an equation. no matter which method you use, be sure to define your variable and write an equation to represent the relationship a rectangle has a perimeter of 30 inches. its length is one less than three times its width what are the length and wodyh of the rectangle?