I just need point tbh so thanks !!
We have that
the Volume of cone=(1/3)*B*h
B=the area of the base
h= the height of the cone
D=3.5 in-----------------> r=D/2=1.75 in
h=5 in
B=pi*r²---------> 3.14*1.75²=9.616 in²
V=(1/3)*9.616*5=48.08 in³--------> 48 in³
the answer is 48 in³
777 when rounded, or 777.1215418091389
15x-20<130
15x<130+20
15x<150
X=150/15
x<10