Carbon-14 has a half-life of 5,730 years. After 17,910 years 1/8 of the carbon-14 in a sample will be left. If 5 grams of carbon-14 are left after 17,190 years how much was in the original sample?

At least two people have the same birthday in a school of 150 students

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm