What is the mid point between the points 1 and 3 and 5 and 7

What is the lcm of 16 and 40 ? 24 and 40 ?

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units

When solving a logarithm equation, how do you find the missing variable ?