What is the square root 25 multiplied by 40 divided by 2

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

Can someone me and explain..will award brainlest!