Energy cannot be created true or false

While riding in a car, Rachel saw 11 red cars pass by in one minute. At this rate, how many red cars will she see in 4 hours?

A train travels 220 miles in 4 hours at a constant rate. What is the constant rate of change for the train in miles per hour? A. 110 miles per hour B. 55 miles per hour C. 330 miles per hour D. 2 miles per hour

Half of the students in a freshman class are 14 years old. One-third are 15 and the rest are 13. Is the mean age greater than or less than the median age?

Barbara knows that she will need to buy a new car in 3 years. The car will cost $15,000 by then. How much should she invest now at 7%, compounded quarterly, so that she will have enough to buy a new car?

A recipe requires 6 cups of flour for 4 servings and 9 cups for 6 servings. How much flour is needed for 5 servings?

Two spherical chocolates are filled with a cream filling. The space inside one chocolate has a radius of 3 cm, and the other has a radius of 4.5 cm. How much more cream filling is in the larger chocolate than in the smaller chocolate? Use 3.

97/16 as mixed number

The equation $4.50 h + $2.00 = $20.00 shows the cost to play h hours of miniature golf. How many hours of golf were played?

Which number is a solution of - 2x < - 4?

Nathan spins 2 different spinners at the same time. There are a total of 10 possible outcomes. which pair of spinners did Nathan spin?