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Answer:
length = 60 foot, width = 30 foot
Step-by-step explanation:
Area of rectangular part, A = 1800 ft²
Cost of fencing three sides is $ 6 per foot and cost of one side fencing is $18 per foot.
Let the length of the rectangle is l and the width of the rectangle is W.
Area = Length x width
A = L x W
1800 = L x W ...... (1)
Total cost of fencing, C = 6 x ( L + W + L) + 18 x W
C = 6 (2L + W) + 18 W
C = 12 L + 24 W
Substitute the value of W from equation (1),
in equation (2)


Differentiate both sides with respect to L:

Put it equal to zero for maxima and minima

L = 60 foot
and W = 30 foot
So, the costing is minimum for length = 60 foot and the width = 30 foot.
Answer:
Part 1
a. .27 < .50
b. .33 < .75
c. 4.60 > 3.89
d. .76 > .08
e. .09 < .11
f. 3.33 > 3.30
Part 2
.27(2)= .54
.50(1)= .50
.27(2)= .54 is larger than .50 because if it was money, .54 is greater than .50
Step-by-step explanation:
Answer:
20% of the number 40 is 8
Step-by-step explanation:
Convert the given value in cm into feet and inches.
<u>Use the unit rates:</u>
- 1 foot = 30.48 cm
- 1 inch = 2.54 cm
<u>Convert:</u>
- 170 cm = 170/30.48 feet = 5.58 feet (rounded)
- 170 cm = 170/2.54 inches = 66.93 inches
or
- 170 cm = 5 feet and 17.6 cm = 5 feet and 7 inches (rounded)