Can you find the area in circumference of a circle given the radius or diameter

Evaluate the integral. (sec2(t) i t(t2 1)8 j t7 ln(t) k) dt

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

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