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• what did archimedes invent using his knowledge of math and science? a compound pulley a new type of metal a machine for building ships a method for observing the stars
  
• on may 18, 1980, mount st. helens in washington state experienced a huge volcanic eruption after a magnitude 5.1 earthquake. during the eruption, hot ash and pumice poured down the west, south, and east sides of the mountain, melting the snow and ice at the top of the volcano and producing volcanic mudflows. which type of process first occurred in the ecosystem around mount st. helens after it erupted? primary succession secondary succession a climax community species extinction
  
• john wants to purchase a car through an online auction site. the auction site offers buyer protection if the transaction begins and ends on the site itself, and if payment is made through the site. however, the seller says that he is in the military and often does not have internet access, so he instructs john to mail him gift cards that cover the total purchase price. john pays, but the car never arrives. is this fraud? why or why not? what should john do?
  
• which procedure justifies whether negative 3 x (5 minus 4) + 3 (x minus 6) is equivalent to negative 12 x minus 6?
  
• the controversy over kit carson was over _____________________ a. whether he was a soldier or a trader. b. whether he was a friend or foe to the navajos. c. whether he sided with the north or the south. d. whether he agreed with slavery or not.
  
• how can lady bracknell asking miss cardew (cecily) if she is ""at all connected with any of the larger railway stations in london” be seen as a reflection of victorian social codes? knowing that jack was found as a baby in a railway station, she is excited that cecily may also be connected to a railway family because it suggests wealth. since she already knows about jack’s background, she is angry that algernon may marry someone who is not as educated as he is. knowing that jack was found as a baby in a railway station, she is concerned that algernon wants to marry someone who may be of a lower social ranking. since she already knows about jack’s background, she is curious to know about cecily’s because it is considered mannerly to show interest in others.
  
• gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. what effect does this have on collisions?
  
• in your own words, explain how cell technology can lead to advances in the understanding of disease mechanisms and transmission.
  
• the formula that relates the length of a ladder, l, that leans against a wall with distance d from the base of the wall and the height h that the ladder reaches up the wall is l = startroot d squared + h squared endroot. what height on the wall will a 15-foot ladder reach if it is placed 3.5 feet from the base of a wall? 11.5 feet 13.1 feet 14.6 feet 15.4 feet
  
• study the images of two different fronts. item a: arrows for a cold front and warm front meet with high level, grey clouds. item b: arrows for a cold front and warm front are moving in the same direction. the warm front is above the cold front. based on arrow movement, why is the front shown in item a different from the front shown in item b? warm air rises above cold air in item a, while two air masses collide in item b. cold air mixes with warm air in item a, while two air masses barely move in item b. warm air is pushed upward near cold air in item a, while a boundary forms in item b. two air masses form a boundary in item a, while warm air rises above cold air in item b.