What is the circumference of the following circle?

4 cm

Misha's test score decreased from 80% to 60%. What was the approximate percent decrease of Misha's test score? 25% 33% 66% 75%

Four fair coins are tossed at once. What is the probability of obtaining 3 heads and one tail? 2

The time it takes to fill a tank varies directly with the volume of the tank. if it takes 1 hour to fill a 400 gallone tank, how long will it take to fill a 600 gallon tank.

Chang and Carlotta solve this problem in two different ways. You have $50 in your bank account. You make $8 per hour mowing lawns.

What is the Solution of X+y=4 X-y=6

There are 378 million children who probably believe in Santa Claus. but some have been naughty so they don't get presents. however, once all the math is done Santa still has to stop in 91.8 million homes.

How many times greater is the value of the digit 4 in 4,560 than in 241?

Dan learned the mass of an electron is about 9.1*10⁻³¹ while the mass of a proton is about 1.7*10⁻²⁷. He thinks electrons have a greater mass than protons because 9.1 is greater than 1.

A developer wants to enclose a rectangular grassy lot that borders a city street for parking. If the developer has 288 feet of fencing and does not fence the side along the street, what is the largest area that can be enclosed? A. 20,736 ft2 B.

Twelve times the sum of a number and 2 is equal to 36. what is the number