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2 years ago

Please help me, this is frustrating!

Mathematics

2 answers:

vodka [1.7K]2 years ago

8 0

A) mes ∠ DAB) = mes ARC DAB/2

if mes ARC DAB = 40° , then mes DAB = 20

b) ∠ BDA is inscribed in half cercle, so its mesure is 90°

c) ∠DBA =90° - 20° = 70° (COMPLEMENTARY angles in a right triangle)

d) LENGTH OF ARC DB:

The central angle DCB = mes ARC DB = 40°;

Arc LENGTH = (40°) * (2πR)/360°, with R = 12 and π ≈ 3.14

Arc Length = (40°)*2*3.14*12/360 = 8.37 CM

kolbaska11 [484]2 years ago

5 0

Check the picture below

for the DB length, make sure your calculator is in Degree mode, since the angles are in degrees.

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krok68 [10]

The theoretical probability that Chandra will be chosen as one of the science fair participants is 0.8 or 80%.

<h3>What is theoretical probability?</h3>

Theoretical probability of an event is the ratio of number of favourable outcome to the total expected number of outcome of that event.

Five students, Adriana, Ben, Chandra, Diana, and Ernesto, would each like one of the four spots at the regional science fair.

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1 year ago

422 8/100 fraction notation

Ivenika [448]

The rule to convert a mixed fraction to an improper fraction is

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Here a = 422, b = 8 and c = 100

Now a × c = 422 × 100 = 42200

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This fraction can also be reduced as

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3 years ago

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