Given the following Probability Distribution, find it's variance. Round your variance number to two decimal places *
Х
0
1
P(x)
0.48
0.21
0.23
0.08
2.
3

Solve the system of equations. y= 2x y= x^2 - 15

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered