the recipicl of a fraction must be found to solve the problem. What is recipical fraction that is required? 6/31 3/13 13/3 31/6

Find the missing factor in exponential form 48^2=3^2 • ?

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.