Questions in Grade High-school

Questions in Grade High-school

📝 Answered - What is the energy needed to raise an electron in the hydrogen atom from the second energy level to the third energy level? A. \(1.52 \times 10^4 \, \text{J}\) B. \(3.63 \times 10^{-19} \, \text{J}\) C. \(2.18 \times 10^{-19} \, \text{J}\) D. \(4.48 \times 10^{-9} \, \text{J}\) E. \(3.03 \times 10^{-19} \, \text{J}\)

📝 Answered - What is the axis of symmetry for [tex]f(x) = -5x^2 - 20x - 10[/tex]?

📝 Answered - Who invaded and conquered Russia in the thirteenth century and with what result? A. Mongols; whole populations were killed, treasures were looted, and cities were leveled. B. Chinese hordes; serfdom expanded, taxes went up, and thousands of people were killed. C. Byzantines; government became more efficient, many Russians adopted Byzantine customs, and the invaders gained trust. D. Muslims; many Russians converted to Islam, and Arabic art, science, and architectural styles were introduced.

📝 Answered - Describe the agriculture of Greece. A. Due to poor soil quality, Greece is forced to import many staple foods as well as livestock. B. Greece imports most food to support its urban centers but relies on small farms in rural areas. C. An agrarian country, Greece is self-sufficient in staple foods and imports only livestock products. D. Greece is an important exporter of livestock products as well as staple foods.

📝 Answered - Convert \(\frac{13}{200}\) into a percentage.

📝 Answered - What is 19.3 rounded to the nearest whole number?

📝 Answered - If a bike race covers 120 miles over 6 days and the cyclists ride the same distance each day, how many miles does each cyclist ride each day?

📝 Answered - How do you factor \(10x^2yz - 22x^3y^2z\)?

📝 Answered - Write an algebraic expression to find the number of seconds in \( n \) minutes. Evaluate the expression for \( n = 20 \).

📝 Answered - An adult ticket to a museum costs $3 more than a child's ticket. When 200 adult tickets and 100 children's tickets are sold, the total revenue is $2,100. What is the cost of a child's ticket? Please explain.