To solve number 10, you should do just as it says and type it into a calculator. To save you the trouble, I have already done this. It equals approximately 4.26.
As for number 11, you have not included the whole question, so there is not currently enough information to solve it.
Answer: second option.
Step-by-step explanation:
The equation of the circle in "Standard form" or "Center-radius form" is the following:

Where the center of the circle is at the point (h, k) and the radius is "r".
In this case you have the following equation of the circle written in Standard form:

You can identify that:

Therefore, the center of the given circle is at this point:

Answer: (-3,4)
Step-by-step explanation:
Khan academy
Answer: 1.3 hours
Step-by-step explanation: I believe it’s 1.3 hours since Pump A can fill a tank in 8 hours, and Pump B can fill a tank in 6 hours, then you divide 8 and 6 which is about 1.333.
Answer:
Step-by-step explanation: