Answer:
Set equal to zero and solve for x
. The multiplicity of a root is the number of times the root appears.
x
=
−
1 (Multiplicity of 1
)
x
=
8 (Multiplicity of 1
)
x
=
−
2
5 (Multiplicity of 1
)
Step-by-step explanation:
9514 1404 393
Answer:
a) V = 4w²h
b) SA = 4w² +10wh
c) SA = 4w² +37.5/w
d) C = 40w² +225/w
Step-by-step explanation:
The relevant formulas are ...
V = LWH
base area = LW
lateral area = H(2(L+W))
__
a) The length is 4 times the width, so the volume is ...
V = (4w)(w)(h)
V = 4w²h
__
b) The total surface area is the sum of the base area and the lateral area:
SA = base area + lateral area
SA = (4w)(w) + 2h(4w +w)
SA = 4w² +10wh
__
c) The volume is 15 m³, so the height in meters in terms of the width in meters is ...
15 = 4w²h
h = 15/(4w²)
Then the surface area is ...
SA = 4w² +10w(15/(4w²))
SA = 4w² +37.5/w
__
d) The equation we have for surface area has one term for base area and a second term for lateral area. We can apply the cost factors to those terms to get the cost of materials:
C = 10(4w²) +6(37.5/w)
C = 40w² +225/w
#2 5.88 #3 6.510 #4 7.578 #5 9.835 #6 11.910 #7 3.72
Answer:
A ≈ 615.75 cm squared
or 616cm squared when rounded off
The answer should be A
please let me know if this is wrong
