You need to arrange ten of your favorite photographs on a mantle above a fireplace. How many ways can you arrange the photographs, assuming that the order of the pictures makes a difference to you.

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label