Amotorboat travels 216km in 4 hours going upstream. it travels 304km going downstream in the same amount of time. what is the rate of the boat in still water and what is the rate of the current?

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)