I think maybe either B or C, ope I helped, sorry if I didn't!!
I'll give you a pdf so you can see it yourself and the correct answer is -32b - 32b
So here. I don't know how to explain so-
The formula is base x height
Let
x--------------> total volume of a glass
we know that
(4/7)x-70=(2/4)x------------> (4/7)x-70=(1/2)x--------> 2*(4/7)x-2*70=x
(8/7)x-140=x
<span>multiplied by 7 the expresion
</span>7*(8/7)x-7*140=7*x-----------> 8x-980=7x--------> x=980 cm³
the answer is
<span>the total volume of the glass is 980 cm</span>³
