Question

For each kilometer above the Earth’s surface, the temperature decreases 7°C. If the temperature at the Earth’s surface is -8°C, what will the temperature be at 7 kilometers above the surface?

a) -57°C
b) -51°C
c) -43°C
d) -36°C

Answer 1

The temperature 7 kilometers above the Earth's surface, starting at an initial temperature of -8°C and decreasing by 7°C per kilometer, would be -57°C, which corresponds to answer choice (a).

Step-by-step explanation:

For each kilometer above the Earth’s surface, the temperature decreases by 7°C. With an initial temperature of -8°C at the Earth's surface, we can calculate the temperature at 7 kilometers above the surface by multiplying the number of kilometers by the temperature decrease per kilometer and then subtracting that value from the initial temperature.

First, calculate the total temperature decrease: 7 km × 7°C/km = 49°C.Then subtract this decrease from the initial temperature: -8°C - 49°C = -57°C.Therefore, the temperature at 7 kilometers above the Earth's surface would be -57°CThe temperature decreases 7°C for each kilometer above the Earth's surface. So, at 7 kilometers above the surface, the temperature will decrease by 7 times 7, which is 49°C.Since the temperature at the Earth's surface is -8°C, we need to subtract 49°C from -8°C to find the temperature at 7 kilometers above the surface.-8°C - 49°C = -57°CTherefore, the temperature at 7 kilometers above the surface will be -57°C (Option a).The correct answer to the question is (a) -57°C.