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Questions in Grade Middle-school

📝 Answered - How can you tell isotopes of the same element apart?

📝 Answered - How can you tell just by looking whether a mixture in water is a solution or a suspension?

📝 Answered - In how many ways can 8 books be arranged on a shelf? A. 8 ways B. 64 ways C. 256 ways D. 40,320 ways

📝 Answered - 1. What is 18 in simplified radical form? A. 9 and 2 B. 2 and 9 C. 3 and 2 D. 2 and 3 2. What is 28 in simplified radical form? A. 2 and 5 B. 2 and 7 C. 7 and 2 D. 4 and 7 3. What is 252 in simplified radical form? A. 21 and 12 B. 12 and 21 C. 7 and 6 D. 6 and 7 4. A square fishpond has an area of 68 square feet. To the nearest tenth, what is the length of one side of the fishpond? A. 8.2 ft B. 9.4 ft C. 17.0 ft D. 34.0 ft 5. A square-shaped billboard has an area of 295 square feet. Christy wants to put lights around the entire perimeter of the billboard. Approximately how much frame does she need? A. 12 feet B. 17 feet C. 69 feet D. 74 feet

📝 Answered - 1. What is the value of the expression \(7^{-3}\)? A. \(-21\) B. \(-\frac{1}{343}\) C. \(\frac{1}{343}\) D. \(343\) 2. What is the value of the expression \(\left(\frac{1}{5}\right)^{-5}\)? A. \(\frac{1}{3125}\) B. \(\frac{1}{25}\) C. \(25\) D. \(3125\) 3. What is the value of the expression \(\left(\frac{2}{4}\right)^{-3}\)? A. \(\frac{1}{32}\) B. \(\frac{1}{6}\) C. \(128\) D. \(256\) 4. What value of \(k\) solves the equation \(k^{-2} = \frac{1}{64}\)? A. \(\frac{1}{8}\) B. \(8\) C. \(32\) D. \(128\) 5. What value of \(n\) solves the equation \(4^N = \frac{1}{64}\)? A. \(-3\) B. \(3\) C. \(16\) D. \(256\)

📝 Answered - True or False? A wave will travel only as long as it has energy to carry.

📝 Answered - What two types of electromagnetic waves do microwaves overlap?

📝 Answered - Sector 2 in a spinner is 90°. If it is spun twice, what is the probability it will land in sector 2 both times?

📝 Answered - What type of wave borders visible light at the red end of its range? What type of wave borders visible light at the violet end?

📝 Answered - Which words in this sentence are common nouns? "In 1620, the ship called the Mayflower sailed from England on rough seas." Choose all answers that are correct. A. rough B. England C. ship D. seas E. Mayflower