(19+8)x11+4 Order of operations
2 answers:
Answer:
Step-by-step explanation:
<h2><u>Order of Operations is another term for PEMDAS:</u></h2><h2><u /></h2><h2><u>Parentheses </u></h2><h2><u>Exponents</u></h2><h2><u>Multiplication and Division </u></h2><h2><u>Addition and Subtraction</u></h2><u />
<u>So we first do the problem in the parenthesis:</u>
<u></u>
<u>Next do the multiplication:</u>
<u>Then lastly, do the addition:</u>
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Answer:
Surface area of the box = 168 cm²
Step-by-step explanation:
Amount of cardboard needed = Surface area of the box
Since the given box is in the shape of a triangular prism,
Surface area of the prism = 2(surface area of the triangular bases) + Area of the three rectangular lateral sides
Surface area of the triangular base =
=
= 12 cm²
Surface area of the rectangular side with the dimensions of (6cm × 9cm),
= Length × width
= 6 × 9
= 54 cm²
Area of the rectangle with the dimensions (9cm × 5cm),
= 9 × 5
= 45 cm²
Area of the rectangle with the dimensions (9cm × 5cm),
= 9 × 5
= 45 cm²
Surface area of the prism = 2(12) + 54 + 45 + 45
= 24 + 54 + 90
= 168 cm²