Tree type height (meters) birch 3 1 4 3 4 1 3, start fraction, 1, divided by, 4, end fraction spruce 2 7 8 2 8 7 2, start fraction, 7, divided by, 8, end fraction oak 3 1 2 3 2 1 3, start fraction, 1, divided by, 2, end fraction what is the difference between the heights of the birch and spruce trees?

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

where are the choices?

a

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.