How many prime numbers are in are between 1 and 50

Petrolium motor oil is a combination of natural oil and synthetic oil. It contains 7 liters of natural oil for every 4 liters of synthetic oil. In order to make 814 liters of Petrolyn oil, how many liters of synthetic oil are needed?

Draw one card at random from a standard deck of cards. the sample space s is the collection of the 52 cards. assume that the probability set function assigns 1/52 to each of the 52 outcomes.

What is the Fourth root of 32

Mike's closing costs will add up to 4 percent and he'll make a down payment of 20 percent on a house that costs $210,000. Over the life of his loan, he will pay $197,040.76 in monthly payments. What is the total cost of his house?

A number plus two and three tenths

A motorboat traveling a distance of 225 miles in 5 hours while traveling with the current. Against the current, the same trip took 9 hours. Find the rate of the boat in calm water and rate of the current.

What is the solution to the equation? 2 (x - 7) = 10x + 18

an ecosystem which is 10 km squared contains a population of 1000 squirrels what is the population density of the squirrels in this ecosystem

Zeus industries bought a computer for $2149. it is expected to depreciate at a rate of 25% per year. what will the value of the computer be in 3 years?

What is it called when a pattern of shapes are repeated to fill a polygon without overlapping or leaving gaps