Earth is approximately 4.54 * 10^9 years old. Humans are thought to have evolved around 2.5 * 10^5 years ago.

For what percentage of the age of the Earth have humans been present? Give your answer to 3 s. f

A cone has a radius of 40 cm and a volume of 1,875 cm3. What is the volume of a similar cone with a radius of 16 cm?

7 1/2 divided by 3/4

in one day in, Annie traveled five times the sum of the number of hours Brian traveled and 2. together the travel 20 hours. find the number of hours each person traveled.

Write an equation or system of equations to solve the problem below. Apollo and Zeus are both on diets. Apollo currently weighs 105 kg and is gaining 2 kg per month. Zeus currently weighs 130 kg and is losing 3 kg per month.

Is y=3cos4x a amplitude

4089 divided by 47 what is the answer going to be. so what is it

Seven times the sum of twice a number and 16

A whole number larger than 2 leaves a remainder of 2 when divided by each of the numbers 3, 4, 5, and 6. What is the smallest such number?

A music store held a one-day sale and everything in the store was 33 percent off. Jennifer bought some music CDs. The prices before the discount were $9.99, $14.99, and $19.99. What was the total discount? Round the answer to the nearest cent.

90 plus what equals 395