There were ships with 3 masts and ships with 4 masts at the Tall ship exhibition. Mollie counted a total of 30 masts on 9 ships she saw. How many of these ships had 4 masts?

(urgent ) use pi 3.14 to estimate the circumference of the circle to the nearest hundredth middle is 4in (urgent )

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height