1、SAT数学题求解答

h(t) = -5t^2+120t+m

At time t=0, a rocket was launched from a platform m meters above the ground. Until the rocket hit the ground, its height, in meters, after t seconds was given by the function h above. For which of the following values of t did the rocket have the same height as it did when t=10?

A 8

B 12

C 14

D 16

E 18

2、速求Sat改错题目的答案

1.America’s first roller coaster ride, which opened in 1884 at Coney Island, Brooklyn, and capable of a top speed of only six miles per hour. No error

2.Over the past two years, apparel manufacturers have worked to meeting the revised federal standards for the design of uniforms. No error

3.Storing bread in the refrigerator delays drying and the growth of mold but increase the rate at which the bread l oses flavor .

4.According to last week’s survey, most voters were disappointed by legislators’ inability working together on key issues

5.When Marie Curie shared the 1903 Nobel Prize for Physics with two other

scientists — her husband Pierre Curie and Henri Becquerel — she had been the first woman to win the prize.

6.Every spring in rural Vermont the sound of sap dripping into galvanized metal buckets signal the beginning of the traditional season for gathering maple syrup.

7.Those investors who sold stocks just before the stock market crashed in 1929 were either wise or exceptional lucky

8.

Most of the hypotheses that Kepler developed to explain physical forces were later rejected as inconsistent to Newtonian theory.

9.The Empire State Building, the Sears Tower, the Canadian National Tower — each of these structures was the tallest in the world at the time they were built.

10.The cost of safely disposing of the toxic chemicals is approximately

five times what the company paid to purchase it.

3、sat数学题。要详细解答过程。谢谢

4、SAT 一道词汇题，求大神来解答~~~

Although she often described reason as the noblest_____, author Ayn Rand never implied that she rejected ____.

A enigma...logic

B faculty...emotion

C good...rationality

D honor...semantics

答案选B，求解为啥。。。。

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