5,200,000×(8.3×10^2)−(3.1×10^8) answer in scientific notation

4.006 x 10^9

Step-by-step explanation:

5,200,000×(8.3×10^2)−(3.1×10^8)

5,200,000×830-(3.1×10^8)

5,200,000×830-310000000

4316000000-310000000

4006000000

4006000000=4.006 x 10^9=

So, we need to move the decimal point 9 places to the right.

This means that the power of 10 will be positive 9.

4.006000000 ( which can be written as 4.006 ) and

Exponent part = 9

So, the solution is:

4.006 x 10^9

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.