Which statements are true?

Select each correct answer.

Some rectangles have exactly one pair of parallel sides.

Some rhombuses have four right angles.

Some quadrilaterals have two pairs of parallel sides.

All trapezoids are four-sided polygons.

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

What does the sign of the slope tell you about a line?