Answer:
It’s going to be b
Step-by-step explanation:
Because add then then divide then put the x on top and simplify then and then subtract
X cannot be negative, so the first option and the third option are out.
when x = 1, f(x) = -1; when x = 4, f(x) = -2 and when x = 9, f(x) = -3. Hence the last option.
The answers comes to be for every 1 unit of pure acid (100%) add three units of 20% and you get the desired 40%
so if you need 40 L (i don't know what container sizes there are so i can't give you an exact amount just add 1 part 100% acid and 3 parts 20% acid) <span />
Answer:
S(r) = 3*π*r^(2)
V(r) = π*r^(3)/2
S(v) = 3*π* (cubic roof (2*V(r)/π)^(2)
Step-by-step explanation:
S(r) = lateral area + (area of base + area of top)
S(r) = 2*π*r*h + 2*π*r^(2) S(r) =2*π*r*r/2 + 2*π*r^(2) = π*r^(2) + 2π*r^(2)
S(r) =3*π*r^(2)
V(r) =π*r^(2)*h since h=r/2 V(r) =π*r^(3)/2
r^(3) = 2*V(r)/π r = cubic roof (2*V(r)/π)
And S(v) = 3*π* (cubic roof (2*V(r)/π)^(2)
