If you know how to do Normal Distribution in Statistics, then please help! I don’t understand how I’m suppose to find the standard deviation with Q1 & the mean.

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Which of the following is an example of conditional probability