What is the means-to-mad ratio of the two data sets, expressed as a decimal to the nearest tenth?
data set 1: {85, 83, 90, 70, 87}
data set 2: {75, 74, 68, 83, 80}

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

The volume of a cube is 8 in to the 3rd power. how long is each side?

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units