A researcher measures 200 counts per minute coming from a radioactive source at noon. At 3:00pm, she finds that this has dropped to 25 counts per minute. What percentage of the original source will remain at 6:00pm?

A researcher wants to compare the effect of a new type of shampoo on hair condition. The researcher believes that men and women may react to the shampoo differently.

Expressions that are equal to 3 (8x+5y)

Translate the sentence into an equation. Two less than the product of 5 and a number is equal to 6. Use the variable w for the unknown number.

Write an exponential growth function to model the situation. A population of 422000 increases by 12% each year

For a group of objects made of the same material, the weight of an object varies directly with its volume. if an object that has a volume of 20 cubic inches weighs 28 ounces, what is the constant of variation?

There were 94172 people at a footbsll game.

Describe the structure of an ionic crystal

How many golf balls will fit into a suitcase

A manager is considering three new machines for filling boxes of cereal at a processing plant. Each of the three machines is assigned to 10 randomly selected employees. The time required to fill 25 boxes using the machine is recorded.

Eli takes a typing test and types all 300 words in 1/10 of an hour. He takes the test a second time and types the words in one 12th of an hour. Was he faster slower on the second attempt.