Which of the following are geometric sequences?

First option: 3, 6, 9, 12, 15, 18

Second option: 10, 5, 2.5, 1.25, 0.625, 0.3125

Third option: 1, 3, 9, 27, 81

Fourth option: 5, 10, 20, 40, 80, 160

A cylinder with a radius of 1 centimeter and a height of 21 cm has the same volume as a cone with a height of 7 cm what is the radius of the cone

Has 3/4 hour to play video games take some 1/12 hour to set up the system each round of his favorite game takes 1/6 hours how many rounds can he play

Which of the following is the inverse of y=12^x?

Fourteen decreased by a number

Cual es la probabilidad de sacar un numero impar lanzando los dados y sumando ambos lados

Triangle T U V. Angle T is blank, U is 93.7 degrees, V is 48.1 degrees. Triangle X Y Z. Angle X is 39.2 degrees, Y is 93.7 degrees, Z is blank. Dusan says that ∆XYZ ~ ∆TUV because two pairs of angles are congruent.

Write a decimal between, .0000003 and. 0000004 in scientific notation

A broken clock is set correctly at 12:00 noon. However, it registers only 20 minutes for each hour. In how many hours will it again register the correct time?

24% of a number is what fraction of that number?

Inequality's of (0,3) (2,-3)