What is 6,400 in scientific notation

What is the equivalent fraction of 36/45=12/?

Hyperloop, a new mode of travel, aims to reach a speed of 170170 / dfrac{/text{m}}{/text{s}} s m . This is 50/%50% less than the speed of sound. What is the speed of sound?

Emily added 5 grams of water into 20 grams of 50% salt solution. She made ___ grams of ___% salt solution.

Write a problem that has two parts. Then solve it by finding the whole.

Round 13.406 to the nearest hundredths

esse burns 365 calories during her yoga class. Round the number of calories to the nearest hundred and then estimate. About how many calories would Jesse burn after 6 yoga classes? A. 2,400 B. 1,800 C. 400 D. 240

Damon gave away 415 pieces of candy for Halloween and collected 84 pieces of candy while trick-or-treating. Which of the following is true? a. Damon had a net loss of 499 pieces of candy. b. Damon had a net gain of 499 pieces of candy. c.

Ursula's triangle has vertices at F (-7,-8), G (-6,-3), and H (5,6). If she translates her triangle 6 units down and 4 units to the left, what are its new vertices?

Kyle is training for a marathon. The equation y = 3x + 5.5 represents the number of miles Kyle can run over time, where y is the number of miles Kyle runs and x is the number of weeks Kyle has been training.

Which number completes the system of linear inequalities represented by the graph? y > = 2x - 2 and x + 4y > = ?