9) A student is planning to write a research report about the benefits of young children playing sports. Which question would BEST focus the research so that the student would find information to use in the report? A) Which sport is the most popular among children? B) At what age should children start playing sports? C) What steps must a person take to play professional sports? D) What are some positive effects of playing sports at a young age?

I believe the answer's D.

The answer is D :]

Hope I was able to help !! <3

a and b are the correct answer to what your looking fior

this is the answer , p = 1 + (1/10)x

step-by-step explanation:

we have,

at sea level pressure is 1 atmosphere (i.e at x =0, p0=1 atmosphere)

at depth 23 meters , pressure = 3.3 atmosphere

since the pressure increases at constant rate as the depth increases, so we can write a relation as:

p =p0 +   kx   , where p is the pressure  , p0 is the initial pressure, x is the depth and k is constant rate of increasing.

to find constant rate k, plug p = 3.3 , p0 = 1 and x= 23 meters

we get,

  3.3 = 1 + k * 23

k = 2.3 / 23   = 1/10

so we can write the function formula as:   p = 1 + (1/10)x