Of the 500 seventh grade students and 250 eighth grade students at Bailey Middle School, 90 students will be chosen at random to attend an assembly. Which of the following would be a representative sample of the number of seventh and eighth grade students at the school?

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

Select all of the categories that apply for the figure below. quadrilateral, trapezoid, parallelogram, rhombus, rectangle, square