Please help guys

I’m trying to finish my course for my bereavement course

(I’m not sure about this)

5:8

2:5

4:7

20:32=5/8

16:40= 2/5

28:49= 4/7

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.