Answer:
23 feet
Step-by-step explanation:
Givens
Volume = pi r^2 h
r = 11
V = 2783 pi
Solution
2783 pi = pi 11^2 * h Cancel the 2 pi's
2783 = 11^2 h Expand 11^2
2783 = 121 * h Divide by 121
2783/121 = h
h = 23 feet
Answer:
1234
Step-by-step explanation:
Ok so
parabola standard form is
y=ax^2+bx+c
if you have the points
(-2,18)
(0,4)
(4,24)
sub points to find a,b and c
(-2,18)
sub -2 for x and sub 18 for y
18=a(-2)^2+b(-2)+c
18=4a-2b+c
(0,4)
sub 0 for x, nice a, an b cancel
4=a(0)^2+b(0)+c
4=0+0+c
4=c
we can sub that back later
(4,24)
24=a(4)^2+b(4)+c
24=16a+4b+c
we have
18=4a-2b+c
c=4
24=16a+4b+c
sub 4 for c
18=4a-2b+4
24=16a+4b+4
minus 4 from both sides
14=4a-2b
20=16a+4b
simlify all equations
7=2a-b
5=4a+b
add to solve for 6a
12=6a+0b
12=6a
divide both sides by 6
2=a
sub back
7=2a-b
7=2(2)-b
7=4-b
-3=b
equation is
y=2x^2-3x+4
D!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
'<em>We </em><u>cross</u><em> </em><u>multiplied</u><em> it'</em>.
Step-by-step explanation:
Lets first understand our proportion and re write in correct Fraction form as:
Eqn(1).
where:
and are the Numerators
and are the Denominators
Now the question sais that Eqn(1). can be written as
This is true since here:
'<em>We </em><u>cross</u><em> </em><u>multiplied</u><em> it'</em>.
<em>Cross Multiplication is used when we have equations of the form Eqn(1) where there is one fraction on the left hand side and one fraction on the right hand side, so that the Numerator of the left hand side is multiplied with the Denominator of the right hand side and similarly the Denominator of the left hand side is multiplied with the Numerator of the right hand side (like a diagonal multiplication). </em>