How can you use four rods that measure 2 cm 5 cm 7 cm and 9 cm to measure a length of 1 cm please help fast

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

For each proportion find the unknown number x 1/5/8=×/15

What is the solution of log2  (3x  -  7)  =  3? 4 5