What percent is equivalent to 840 ? 8% 20% 25% 40%

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)