How does President Kennedy frame the history of progress in this speech? A He condenses the past 50,000 years of human history to showcase the rapidity of recent technological progress.
B He condenses the past 50,000 years of human history to highlight America’s major part in recent progress and industrialization.
C He compares the shortness of known human history to the lengthiness of pre-history, effectively showing us that the future is a wide expanse to be found in space.
D He compares the shortness of known human history to the lengthiness of pre-history, effectively showing us that progress as we know it has just started.

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99

uh, the answer is d i guess.

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."