Sara draws à card from a standard deck. If the card is red, she rolls a standard dle. If
the card is black, she flips a coin. Which of
the following tree diagrams correctly displays
the sample space for Sara's experiment?

maybe i can

-81 -56 -27 0 81

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

your answer is b.

1,333 cubic feet  

and i know this one is right.