A chemist cooled a solution of magnesium sulfate and water. The graph shows the temperature of the solution over time.
Temperature (°C)
30
20
10
10
Time (minutes)
What does the slope of the line represent?
A The average temperature of the solution was 6°C.
B The temperature of the solution decreased until it was 6°C.
C The temperature of the solution decreased by 6°C per minute.
D The temperature of the solution increased by 6°C per minute.

2

step-by-step explanation:

hm let me think hm think think hm think yes

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

you can use a^2+ b^2=c^2