1. Dennis started hiking at sea level. He recorded his starting position as 0. He climbed upward,
and his elevation increased by 400 feet. He recorded his ending position as 400. Using the same
method of measuring, a second hiker had a starting position of -40. Which statement describes
the starting position of the second hiker?

The second hiker started 40 feet below sea level.

Step-by-step explanation:

The second hiker started 40 feet below sea level.

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d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.