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19.11.2020 •
Mathematics
A watermelon was estimated to weighs 7,458 grams. A scale measured the actual weight as 8,475 grams. Express the measurement error as a percentage of the actual weight. Please Help Asap! Thank you so much!
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Ответ:
Part 1) The volume of the composite figure is
Part 2) The surface area of the composite figure is
Step-by-step explanation:
Part 1) Find the volume of the composite figure
we know that
The volume of the figure is equal to the volume of a cone plus the volume of a hemisphere
Find the volume of the cone
The volume of the cone is equal to
we have
Applying Pythagoras Theorem find the value of h
substitute
Find the volume of the hemisphere
The volume of the hemisphere is equal to
we have
substitute
therefore
The volume of the composite figure is equal to
Part 2) Find the surface area of the composite figure
we know that
The surface area of the composite figure is equal to the lateral area of the cone plus the surface area of the hemisphere
Find the lateral area of the cone
The lateral area of the cone is equal to
we have
substitute
Find the surface area of the hemisphere
The surface area of the hemisphere is equal to
we have
substitute
Find the surface area of the composite figure