MATHEMATICS MIDDLE SCHOOL

A type of bacteria moves 8 x 10^-7 meter per second. How far does this bacteria move in 5.45 x 10^9 seconds? Write your answer in micrometers, using scientific notation. HELP PLEASE :(
Explain fully how you got your answer. Thanks SO much.

Answers

Answer 1
Answer: you have to multiply the two standard forms together
(8 x 10^-7) x (5.45 x 10^9)
to multiply multiply the two numbers together then the 10 powers, and when multiplying powers you simply add the two powers together.
43.6 x 10^(-7 + 9)
43.6 x 10^2
then put this into standard form
4.36 x 10^3 (as standard form allows for only 1 number infront of the decimal place) and to get back to 43.6 x 10^2 you have to multiply by 10 so this = 4.36 x 10 x 10 x 10 =4.36 x 10^3

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-104=8x what is x ????

Answers

-104=8x \n \n - (104)/(8) = x \ / \ divide \ each \ side \ by \ 8 \n \n -13 = x \ / \ simplify \n \n x = -13 \ / \ switch \ solution \ around \n \n

The final result is, x = -13.
-104 = 8x. The x is being multiplied by 8, so to undo the multiplication divide both sides of the equal sign by 8. 8x/8 = x and -104/8 = -13 so x = -13.

A regular octagon has sides measuring about 4cm. If the octagon is divided into 8 congruent triangles, each has a height of 5 cm. What is the area of the octagon?

Answers


Base of each triangle = about 4 cm
Height of each triangle = 5 cm

Area of each triangle = (1/2) (base) (height)
and there are 8 of them.

Total area = (8) x (1/2) x (base) x (height) =

                       (4) x (about 4 cm) x (5 cm) = about 80 cm² .

 
The area of a triangle is 1/2*base*height

So, do that for one of the triangles, since they're all the same 1/2*4*5=10cm squared

Multiply by 8 to find the total

10*8=80

80 cm squared.

Convert 0.00049 to scientific Notation

Answers

i think its 4.9 x 10-4

Answer:

It is 4.9 x 10-4

Step-by-step explanation:

So every time you do this type of scientific notation you need to count how many "0" there are and you need to check if they are in front of the number ( ex: 74.000 ) or if the are in the back ( ex: 0.0074 ) In this case since is in the back you would get the 10 and put it to the power of -4 since there is 4 zeros behind it. and then you just get the " 4 9 "( put a " . " between it ) and multiply it by 10^(-4). ( You don't need to actually do the multiplication unless your teacher ask you to )

Hope this helps ✌️

What type of number is -4n

Answers

Answer:

if there is a letter in "number" then it is a variable. By the way type of the number is negative

Which expression is equivalent to 4/9 divided by 2/3

Answers

4/9 divided by 2/3

4/9 * 3/2 = 12/18

12/18 = 6/9 = 2/3

2/3 is the answer

Faye has 180 yellow beads and 12 packets. Faye decided to double the number of yellow beads in the mix. How many packets will she make if she fills rach oacket with 60 beads

Answers

Faye has 24 packets of yellow beads
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