The following table shows the probability of rolling the numbers 1 through 7 on a fair 7-sided die.
х 1 2 3 4 5 6 7
P(x)1/7 1/7 1/7 1/7 1/7 1/7 1/7
What is the standard deviation of the random variable x, “the number that comes up on the die"?

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3