Find the difference in altitude between Mt. Rainier, Washington, 4392 m above sea level, and Death Valley, California, 86 m below sea level.

4478 m.

Step-by-step explanation:

That is 4392 - (-86)

= 4392 + 86

=  4478 m.

grab rope, tie a loop-de-loop, put it around ur neck, now jump while its tied to a high place. now your shoes are cool.

step-by-step explanation:

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²