30 points! The human body is made up of about 37.2 trillion blood cells. That’s a lot of blood cells! Instead of writing 37,200,000,000,000 to express this very large number, we use scientific notation to write it as 3.72 × 1013.

A. Research to find another large or small number from a real-world situation. Write the number in scientific notation. Provide a hint that describes what your number represents.
B. Read another student’s post and guess what that student's number describes. Then write the number in standard form. Try to choose a post that doesn’t have any responses to it yet.
C. Respond to all replies to your post. For each post, check whether the number is correctly written in standard form and whether the student correctly guessed what your number represents. At the close of the discussion, reveal the answer.

try 3.72x1013

Step-by-step explanation:

if that dont work then look it up

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4