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3 years ago

Which expressions are greater than 12.5? (Select all that apply)

Mathematics

2 answers:

Hatshy [7]3 years ago

7 0

C is the only one greater than 12.5 i think so
also b and d

Vladimir [108]3 years ago

3 0

C. 2√95 =19.49
D.8√π =14.17
b. 4π = 12.5663 ≈ 12.6 so idk if that counts but yeah i guess it counts so it's B,C,D

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STatiana [176]

Answer: B, D

Step-by-step explanation:

You Can just count the blocks

B: has 24 and D has 24 which both of them are between 30 and 20

4 0

2 years ago

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In the circle below, DB = 22 cm, and m<DBC = 60°. Find BC. Ignore my handwriting.

Karo-lina-s [1.5K]

Answer:

$BC=11\ cm$

Step-by-step explanation:

step 1

Find the measure of the arc DC

we know that

The inscribed angle measures half of the arc comprising

$m\angle DBC=\frac{1}{2}[arc\ DC]$

substitute the values

$60\°=\frac{1}{2}[arc\ DC]$

$120\°=arc\ DC$

$arc\ DC=120\°$

step 2

Find the measure of arc BC

we know that

$arc\ DC+arc\ BC=180\°$ ----> because the diameter BD divide the circle into two equal parts

$120\°+arc\ BC=180\°$

$arc\ BC=180\°-120\°=60\°$

step 3

Find the measure of angle BDC

we know that

The inscribed angle measures half of the arc comprising

$m\angle BDC=\frac{1}{2}[arc\ BC]$

substitute the values

$m\angle BDC=\frac{1}{2}[60\°]$

$m\angle BDC=30\°$

therefore

The triangle DBC is a right triangle ---> 60°-30°-90°

step 4

Find the measure of BC

we know that

In the right triangle DBC

$sin(\angle BDC)=BC/BD$

$BC=(BD)sin(\angle BDC)$

substitute the values

$BC=(22)sin(30\°)=11\ cm$

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2 years ago

suppose a DVD costs $19 and a CD costs $14 what is the inequality to find how many CD's you can buy along with one DVD if you ha

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y = number of cd's

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2 years ago

In a sample of digits(0,1,2,3,4,5,6,7,8,9,) what is the probability that a digit is 7 or greater

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Answer:

$\frac{3}{10}$

Step-by-step explanation:

There are 10 numbers in total. Only three are 7 or greater: 7, 8, 9.

So the answer is $\frac{3}{10}$ .

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2 years ago

Hong drove 648 miles in 9 hours.

ioda

Answer:

864 miles

Step-by-step explanation:

648/9 = 72 mph

72 x 12 = 864

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2 years ago

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