The coordinates a(2, 1), b17, 1), c(2, 4) form what type of polygon?
a. an acute triangle
b. an obtuse triangle
c. a right triangle
d. an isosceles triangle

Math each whole number with a rational,exponential expression

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.