I am going to take a guess C
Answer: B
<u>Explanation:</u>
rate x time
Chris: 40 x t = 40t
Amy: 60 x t - 2 = 60(t - 2)
Use the distance formula:


*****************************************************************************
Answer: B
<u>Explanation:</u>
x² - 8x + 19
a=1 b=-8 c=19
Use the Quadratic formula to find the solutions for x:






= 4 ± i√3
Solutions are: Factors are:
x = 4 + i√3 x - (4 + i√3) = 0
x = 4 - i√3 x - (4 - i√3) = 0
Answer:
Fuel 1 changed phase because the energy drawn from it dropped its temperature below the transitional temperature that causes a phase change, fuel 2 still has its temperature well above the transitional temperature required to change phase.
Explanation:
For a substance to change phase, a transitional temperature has to be reached. This is because, the temperature of substances generally indicates the average kinetic energy of its molecules. An increase in energy input to the system will result in a change to a more mobile phase like from solid to a liquid state or from a liquid state to a gaseous state state, while taking energy from the system will cause a transition to a less mobile phase like gas to liquid or liquid to solid state.
The rhythm identified by selecting the single best answer is; Sinus Bradycardia.
<h3>How to Identify the Heart Rhythm?</h3>
Looking at the image of the heart beat diagram, we can say that the rhythm identified by selecting the single best answer is Sinus Bradycardia.
Sinus bradycardia is a heart rhythm where your heart beats slower than expected (under 60 beats per minute for adults) but otherwise works normally. It's fairly common, especially in adults over 65 and those who exercise regularly. It's usually not serious unless you have symptoms.
Sinus bradycardia is a type of slow heartbeat. A special group of cells begin the signal to start your heartbeat. These cells are in the sinoatrial (SA) node. Normally, the SA node fires the signal at about 60 to 100 times per minute at rest. In sinus bradycardia, the node fires less than 60 times per minute.
Read more about Heart beat Rhythm at; brainly.com/question/4581254
#SPJ1