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BARSIC [14]
3 years ago
15

Express this number in scientific notation. 31 billion

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
4 0

Answer:

3.1 * 10^10

Step-by-step explanation:

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Help if u don’t mind <br> A)117<br> B)115<br> C)130
Alexxandr [17]

Answer:

I believe the answer i B

Step-by-step explanation:

I'm not 100% sure so please correct me if im wrong, sorry if i am

6 0
3 years ago
A chemist is using 336 milliliters of a solution of acid and water. If 19.4 % of the solution is acid, how many milliliters of a
denpristay [2]

Answer:

65.2 milliliters

Step-by-step explanation:

The quantity 336 milliliters is the 100% of the solution. We can represent this information on a table:

Milliliters        Percentage of solution

     336        ⇔            100%

we are told that 19.4% of this solution is acid, and we need to know how many milliliters represents this percentage. I will call the number of milliliters of acid on the solution 'x', and updating the last table:

Milliliters        Percentage of solution

     336        ⇔            100

     x             ⇔            19.4%

We can solve this problem for 'x' using the<u> rule of three</u> which is to multiply the cross quantities on the table (336 by 19.4) and then divide by the remaining amount (100):

x = 336(19.4)/100

x = 6,518.4/100

x = 65.184

which rounding to the nearest tenth is: 65.2 milliliters

8 0
3 years ago
Can you please help me with this math problem
Lera25 [3.4K]
This question is nasty. It sounds like you should be finding area of the figure you see. I'll do that first, although I don't think it's the right answer. (But it might be).

Area Trapezoid = (b1 + b2) * h / 2
b1 = 8
b2 = 12
h = 5
Area Trapezoid = (8 + 12 ) * 5 / 2
Area Trapezoid = 20 * 5/2
Area = 50 square feet.

The problem is that no lumber yard will cut that for you without charging you. The practical answer is 12 * 5  = 60 square feet is what you will have to buy. Then you cut out the triangles for yourself.
3 0
3 years ago
Read 2 more answers
U= a-k-b solve for a
irina [24]

Answer:

a = b + k + u

Step-by-step explanation:

hope this helps

3 0
3 years ago
PLEASE HELP DUE IN A HOUR I WILL GIVE BRAINLIST
balandron [24]

Answer: here is an example in the screenshot

it is A,B,C, or D

Step-by-step explanation:

For a given perimeter, the area will be maximized when all the sides are the same length, which makes it actually a square. A square is still a rectangle, though! So, if you know the perimeter, divide it by four to determine the length of each side. Then multiply the length times the width to get the area.

BTW U CAN USE A CALCULATOR

6 0
3 years ago
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