punk480

In Spanish class, the girl to boy ratio is 6 to 4. If there are a total of 20 students, how many boys are there?

If 35% of an amount is 21, find the complete amount. Would it be 60?

A circular pool with a diameter of 32 feet is surrounded by a wood deck of uniform width. If the area of the deck is 68π square feet, what is x, the width of the deck?

A solution of iodine (I2) in carbon tetra-chloride(CCl4) is used when iodine is needed for certain chemical tests. how much iodine must be added to prepare a 0.480 m solution of iodine in CCl4 if 100.0g of carbon tetra-chloride is used?