What is the best tool to use to measure the mass of a grapefruit?

Hi my sisters and brothers can tell me the answer because i don’t understand the question

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)

Find the value of x in the diagram below. select the best answer from the choices provided