Answer:
hi
Here are the answers you need
a. Romi's speed = slope of graph = 1000/15 - 0 = 66m/min
b. for 10 minute
c. I do not know the answer for this question, please forgive me
d.at 1000m from home they meet
I hope this helps you.
May god bless you and if you like this answer and think it helped you very much please mark me as brainliest because that will help me very much.
Answer:
1a. 0.030 s
1b. 15×10¹⁰ kg m²/s²
Explanation:
Remember order of operations (PEMDAS).
1a. 
Start by dividing the numbers, the powers of 10 (using exponent rules), and the units.

Take the square root:

Finally, multiply (you'll need a calculator):

1b. 
Start by squaring the last term:

Now like before, multiply the numbers, the powers of 10 (using exponent rules), and the units:

Answer: The decibel scale is a logarithmic scale where each bel or 10 decibels correspondents to a factor of ten. A power intensity of 10^(-12) watts per square meter is the standard reference for a SPL of 0 db. So an SPL of 98 db corresponds to a power intensity of 10^(9.8)*10^(-12) or 10^(9.8–12) w/m^2.
0.006309573 w/m^2.
You can also readily find the value for any given SPL using the online calculator at: http://www.sengpielaudio.com/calculator-soundlevel.htm
Explanation: