Math  /  Geometry

QuestionFill in the blank. A rectangular field has a width of (a+b)3(a+b)^{3} meters and aa length of 2a22 a^{2} meters. Determine the area of this field for a=5a=5 and b=3b=-3.
The area of the field is square meters.

Studdy Solution

STEP 1

1. The field is rectangular.
2. The width of the field is given by the expression (a+b)3(a+b)^{3}.
3. The length of the field is given by the expression 2a22a^{2}.
4. Values for aa and bb are provided: a=5a=5 and b=3b=-3.

STEP 2

1. Calculate the width of the field using the given expression and values for aa and bb.
2. Calculate the length of the field using the given expression and value for aa.
3. Determine the area of the field by multiplying the width and length.
4. Provide the final answer.

STEP 3

Calculate the width of the field:
Width=(a+b)3 \text{Width} = (a+b)^{3}
Substitute a=5a = 5 and b=3b = -3:
Width=(5+(3))3=(53)3=23=8 meters \text{Width} = (5 + (-3))^{3} = (5 - 3)^{3} = 2^{3} = 8 \text{ meters}

STEP 4

Calculate the length of the field:
Length=2a2 \text{Length} = 2a^{2}
Substitute a=5a = 5:
Length=2(5)2=2×25=50 meters \text{Length} = 2(5)^{2} = 2 \times 25 = 50 \text{ meters}

STEP 5

Determine the area of the field by multiplying the width and length:
Area=Width×Length \text{Area} = \text{Width} \times \text{Length} =8 meters×50 meters = 8 \text{ meters} \times 50 \text{ meters} =400 square meters = 400 \text{ square meters}
The area of the field is:
400 square meters \boxed{400 \text{ square meters}}

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