15 golf balls that were found in the lake were made from recycled materials. These balls were 20% of all the balls in the lake. How many golf balls were in the lake?

a racing car has a uniform acceleration of 4m/sec^2? what distance will it cover in 10 second after start.

It takes 0.25 hours to complete each test lession. Make a table showing how long 3, 7, 9, and 12 lessions take. Give the constant of proportionality and write an equation that relates the time (t) to the number of sessions (s).

The sum of 3 times a number and 6 is equal to 2 times the number

How many different ways can the letters in the word "micro" be arranged if it always has to start with a vowel?

Solve: - 5√x = - 15 a: x=-9 b: x = - 7 c: x=9 d: x=7

How many quarter pound burgers can george make out of 3 1/2 pounds of ground beef?

The area of a circle is πr2. To find the area of a sector with a central angle of Θ, measured in radians, by what should you multiply πr2?

Without calculating, is the equation (1.8 times 3) times 2.1 = (1.8 times 2.1) true or false? Explain your reasoning.

1) You use a sine function to model the percentage of the Moon's face that is lit by the Sun every night. At full moon, all of the Moon's face is lit (100%). At New Moon, none of the moon's face is lit (0%).

There are 10 men and 14 women in Kathleen's math class. What is the ratio of women to the total number of students in the class?