A die is rolled 360 times. Find the standard deviation of the number of time a 3 will be rolled

Antonia and carla have an equivalant percentage of green marbles in their bags of marbles. antonia has 4 green marbles and 16 total matbles. if carla has 10 green marbles , how many total marbles does carla have

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

Write the expression 7x^3-28xy^2 as the product of 3 factors