The square sum of 10 values is 400, the mean is 5. if taking away a value 8 from the data, find the remaining mean and variance of the data.
anyone knows how to solve it?

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Which of the following is true about the graph of f(x)=7^x. select all that apply. a= it intercepts the x axis b=it intercepts both axis c=it intercepts neither d=it intercepts the y axis