A quadrilateral with exactly one pair of parallel sides is called a

For a sample of 100 men, the median weight is 155 lbs., the first quartile is 150 lbs., and the third quartile is 162 lbs.

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I have 30 ones, 2 thousands, 4hundred thousands 60 ten, and 100 hundreds. What number am I?

What is ... $500 decreased by 10%

9,000g equals how many kg

Norma received one penny on first day of the month and each day after that she received triple number of pennies

Round-trip bus fare is $2. Justin rides the bus 5 days a weeks to work and 2 nights a week to school. He can buy a pass at school that allows 6 months of unlimited bus rides for $400.

Suppose that the number of inhabitants of country a is given by y=-7.24x+937.69 million, and the number of inhabitants of country b is given y=2.16x+834.29 million, where x is the number of years since 1960.

What is the sum of the geometric sequence 1, 3, 9, if there are 11 terms?

What is the volume of a sphere if the radius is six