1)find the center & radius for the following
1. 2x^2+2y^2=72
2. (x-3)^2+(y-1)^2=4
3. (x-5)^2+(y+2)^2=49
4. (y-4)^2+(x-10)^2=64
5.(x^2-6x+9)+(y^2+8y+16)=1
6. x^2+12x+y^2-8y=-27
7. write an equation for the circle with center at (3,-4) and with (2,-1) a point on the circle.

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days