Megan has 23 marbles, and jack has 22.about how many marbles do they have altogether.

a. about 30 marbles
b. about 70 marbles
c. about 40 marbles
d. about 60 marbles

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.

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles