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

Use the unit circle to find tan 30°. a. 3 b. square root 3/2 c. 1/2 d. 2

The side of a rectangle are in the ratio 3:2. What is the length of each side of the perimeter of the rectangle is 55 cm?

Caroline has 5 chores to complete each week. She gets paid $4.60 each week. How much does she get paid per chore completed?

Rate and unit rate 360 customers in 30 days

What is the first 10000 numbers of pi

What is sum of two fifths and one forth?

A tank is full of oil weighing 30 lb/ft3. The tank is a right rectangular prism with a width of 2 feet, a depth of 2 feet, and a height of 3 feet. Find the work required to pump the water to a height of 2 feet above the top of the tank

What is the constant term in the expansion of the binomial (x - 2) 4? - 16 16 - 32 32

Eddy signed-up for a karate class that charges a monthly fee of $45. A one-time enrollment fee of $50 is charged at sign-up. Which expression represents the total fees that Eddy has paid to the karate school after m months, in dollars?

There are x sparrows in a tree. There are 50 sparrows on the ground beneath the tree. Let y represent the total number of sparrows in the tree and on the ground. Express y in terms of x.