What is the product of 0.8

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

He concluded that a heavier object dropped from the same height as a lighter object will land

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)