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3 years ago

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According to a medical institution, about 44% of people from a certain country have type A blood. Suppose 80 people show up at a

typical blood drive.
What’s the expected proportion of people who are type A?

1 answer:

vesna_86 [32]3 years ago

8 0

Do 80 divided by 44%

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The following picture is a square pyramid where DE=8 cm and m∠ADE=60°.

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<u>Given</u>:

The length of DE is 8 cm and the measure of ∠ADE is 60°.

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<u>Length of AD:</u>

The length of AD is given by

$cos 60^{\circ}=\frac{FD}{8}$

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Length of AD = 8 cm

<u>Slant height:</u>

The slant height EF can be determined using the trigonometric ratio.

Thus, we have;

$sin \ 60^{\circ}=\frac{EF}{8}$

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The surface area of the square pyramid can be determined using the formula,

$SA=Area \ of \ square + \frac{1}{2} (Perimeter \ of \ base ) (slant \ height)$

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$SA=8^2+\frac{1}{2}(8+8+8+8)(4 \sqrt{3})$

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Rounding off to one decimal place, we get;

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