Justin bieber's sand castle is 180 cn tall but the wind is blowing away samd at a rate of 8 cm per minute. taylor swift's sand castle is 160 cm tall and she is adding sand to it at a rate of 6 cm per minute. alfter how many minutes will their sand castles be the same height?

What is the absolute value of the complex number -4-sqrt2i

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

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.