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High School

A radioactive substance decays exponentially. A scientist begins with 350 milligrams of a radioactive substance. After 14 hours, 175 mg of the substance remains. How many milligrams will remain after 20 hours

Which statement best describes the valleys of the Ridge and Valley region? A.They are 700–800 feet below sea level.B.They are 700–800 feet above sea level.C.They are made mostly of limestone.D.They are made of gorges and canyons.

What does this excerpt imply about Edwards's view of society?

A sample of iron has the dimensions of 2 cm x 3 cm x 2 cm. If the mass of thisrectangular-shaped object is 94 g, what is the density of iron?​

The weight of a body kept at a distance of 6400 km from the centre of theearth is 10N. What will be the weight of another object kept at a distance of 12,800km ?​

In the set of numbers from 1 to 10, which elements are in both the subset of even numbers, and the subset of multiples of 5?​

A researcher wants to study stress and coping in students transitioning into middle school. Students _______ would be the most representative sample.

Muffy's Muffins had a net income of $2,325. The firm retains 60 percent of its net income. During the year, the company sold common stock worth $295. What was the cash flow to shareholders?

Solve 13u2+23u=−112 by using the quadratic formula. Give an exact answer and simplify any fractions. If there are multiple answers, list them separated by a comma, e.g. 1,2. If there is no solution, enter ∅.

Evaluate the expression when x = 5 and z= 7. 5z +x Simplify your answer as much as possible.

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