399.6 square meters
7•8/2=28
28•3=84
8•6.9/2=27.6
(12•8)•3=288
84+27.6+288=399.6
Answer: 5 minutes
Step-by-step explanation:
Answer: 15 centimeters
Step-by-step explanation: You cut the rectangle into two triangles following the diagonal. You add 12 squared (144) and 9 squared (81) together. You get 225. You get the square root of 225 which is 15 and that is your answer. Basic solving for the hypotenuse.
I think this question is a part of another question; you can have any ratio that can add up to 114 cm.
Answer:

Step-by-step explanation:
Given




Required

This is calculated as:

Since it is a selection without replacement, the computation is:

So, we have:



