Hey there! I'm happy to help!
To find the surface area of a sphere, here is what you do.
You square the radius.
4²=16
You multiply by 4.
16×4=64
And you multiply by pi!
64×π=64π
Therefore, the surface area of the sphere is A. 64π units². It's that easy!
Now you can find the surface area of a sphere! Have a wonderful day! :D
Answer:
<em>Mark used 6.43 megabytes of data.</em>
Step-by-step explanation:
The given equation is:
, where
is amount of data used in megabyte.
For finding the amount of data Mark used, <u>we need to solve the above equation for
</u>.
First subtracting 5.25 from both sides, we will get.....
Now, dividing both sides by 0.3 ...........

<em>(Rounded to the nearest hundredth)</em>
Thus, Mark used 6.43 megabytes of data.
Rate x time = distance
25 x 35/60 = distance (35/60 is 35 minutes out of an hour- 60 minutes)
25/1 x 7/12 = distance (I put the 25 over 1 and reduced 35/60)
175/12 ≈ 14.58 miles
Notice that the time had to be in a fraction of an hour in order to do this.