David is taking an economics course in which there will be 4 tests, each worth 100 points. he has scores of 89, 92, and 95 on the first three tests. he must make a total of at least 360 in order to get an a. what scores on the last test will give david an a?

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.

can you put the picture up?

step-by-step explanation: