Questions in Grade High-school

Questions in Grade High-school

[Free] Television screen sizes are the diagonal length of the rectangular screen. Hector recently changed from watching a television with a 13-inch screen to a television with a similar 19-inch screen. If a boxcar appeared 8 inches long on the 13-inch screen, how long, to the nearest inch, will it appear on the 19-inch screen?

[Free] A barge travels twice as fast when it is empty as when it is full. If it travels 20 miles north with a cargo, spends 20 minutes unloading, and returns to its original port empty, taking 8 hours to complete the entire trip, what is the speed of the barge when it is empty?

[Free] Calculate the molar mass of the following compounds: - FeCl3 - Fe2(SO4)3 - PbO - PbO2 - Pb3O4

[Free] From a class of girls and boys, the probability that one student chosen at random to answer a question will be a girl is \(\frac{1}{3}\). If four boys leave the class, the probability that a student chosen at random to answer a question will be a girl is \(\frac{2}{5}\). How many boys and girls are there in the class before the four boys leave?

[Free] If the length of a rectangle is increased by 120%, and its width is decreased by 20%, what happens to the area of the rectangle?

[Free] Japan is located to the east of South Korea. True or False

[Free] During World War I, many American women helped gain support for the suffrage movement by A. protesting against the war B. joining the military service C. working in wartime industries

[Free] Which two states donated land to Washington D.C.?

[Free] How are the names of Washington D.C. streets running north to south organized?

[Free] How many pillars are on the Lincoln Memorial?