Agroup of students weighs 500 us pennies. they find that the pennies have normally distributed weights with a mean of 3.1g and a standard deviation 0.14g.
a) what percentage of pennies will weigh between 2.8 and 3.3g
b) what percentage of pennies will weigh between 2.11 and 3.5g
c) what percentage of pennies will weigh less than 2.96g
d) what percentage will weigh more than 3.4g

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

Add the fractions and simplify 1/2+ 1/3