A cup of coffee contains 130mg of caffeine. If caffeine is eliminated from the body at a rate of 11% per hour, how long will it take for half of this caffeine to be eliminated from a person's body?

The least common denominator of two fractions is 100. If you subtract the two denominators, their difference is 5 What are the denominators?

For Madeline's lemonade recipe, 3 lemons are required to make 6 cups of lemonade. At what rate are lemons being used in lemons per cup of lemonade? Express your answer in simplest form.

A TV screen is 15 inches high and 20 inches wide. Write each ratio. A. Height to width B. Width to height

Outta Luck Towing Company charges $50 to hook a vehicle to the truck and $2.75 for each mile the vehicle is towed. Write an equation that best represents the relationship between the number of miles towed, m, and the total charges, c?

The function f (x) = - a^x+4 will never cross the x axis

A rectangle with a length of 6 inches and a width of 1 foot has a perimeter of 14 inches. True False

You have a roll of string that is 60 meters long. Which BEST approximates the number of yards of string on the roll? (1 yd = 0.9144 meter) A) 50 yards B) 60 yards C) 66 yards D) 98 yards

In a college of exactly 2740 students, exactly 55 % are male. what is the number of female students? express your answer as an integer.

What is the sum of 2/3 and 3/4

A scientist is working with 0.7m of gold wire. How long is the wire in millimeters? Be sure to include the correct unit in your answer.