11. a) .19 b) 19/100
12. a) 23% b) .23
13. a) 7% b) 7/100
14. a) .11 b) 11/100
15. a) .2 b) 2/100
16. a) .9 b) 9%
17. a) 13% b) 13/100
18. a) ¼ b) .25
Hoped it helped. ☺
C. because u can't name a congruent triangle by angle angle angle
It is given that
A stone is thrown into a pond, A circular ripple spreads over the pond in such a way that the radius is increasing at a rate of 2.5 feet per second.
In one second the increment in radius is 2.5 feet
After t seconds, the increment in radius is given by
The area of the circular ripple is
Substitute r(t)=2.5t, we get
The required function is
Hence the fourth option is correct.