Radium-226, a common isotope of radium, has a half-life of 1,620 years. How many grams of a 120-gram sample will remain after t years?

Calculate the length of the circumference of a circle with diameter of 7cm? ~3

4=-0.8n solve the equation

The distance between two cities is 600 miles. On a map, they are 4 inches apart. What is the scale of the map?

308056008 what is in word form

Suppose John has a torn tendon and is facing surgery to repair it. The surgeon explains the risks to John; infection occurs in 3% of operations, the repair fails in 14% of operations, and both infection AND failure occur together in 0.

The cost of 12 gallons of gas is 28.68 how many miles can you expect to drive

Antonio sold skis for $220. His wholesale cost was $165. What was the percent markup?

Quilt is 42 square feet what are it's possible dimensions if they must be whole numbers

Step by step ways to solve 3.4 x 4.72

Which of the following values is equal to - (-4.3) ? -4.3 0 4 4.3