Many states have programs for assessing the skills of students in various grades. the indiana statewide testing for educational progress (istep) is one such program. in a recent year, 76,531 tenth-grade indiana students took the english/language arts exam. the mean score was 572 and the standard deviation was 51. use the fact that the istep scores are approximately normal, n(572, 51). find the proportion of students who have scores between 500 and 650.

P ( 500<X<650 ) = 0.8577

Step-by-step explanation:

Since μ=572 and σ=51 we have:

P ( 500<X<650 ) = P ( 500−572< X−μ<650−572 )

⇒ P ( 500<X<650 ) = P ( −1.41<Z<1.53 )

Now, Using the standard normal table to conclude that:

P ( −1.41< Z <1.53 ) = 0.8577

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "

answer: 2 and 1

step-by-step explanation: got this question