Air temperature decreases 6 degrees Celsius for every 1000m increase in elevation. The air temperature at the top of the mountain is -12 degrees Celsius.

2,160 π

step-by-step explanation:

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours

true. i hope this ! go answer some of my newest