2. Spaghetti takes about 9 minutes to cook at sea level, but about 14 minutes in the mountains. Why do you think this is so?

  water boils at a lower temperature in the mountains

Explanation:

The temperature at which the vapor pressure of water is equal to atmospheric pressure is lower in the mountains, because atmospheric pressure is lower there. Hence the temperature of boiling water is lower in the mountains.

Spaghetti cooked at a lower temperature takes longer to cook.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

the answer is d. 74.02