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2 years ago

Answer please please

Mathematics

2 answers:

Neporo4naja [7]2 years ago

5 0

Answer:

12.56 $units^{2}$

Step-by-step explanation:

Area = $\frac{C*C}{4\pi }$

So, (12.56*12.56)/(4*3.14) results in $12.56^{2}$ /12.56 resulting in 12.56 units squared

adoni [48]2 years ago

5 0

Hello how are you doing today

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−13π/5 find the reference angle

miss Akunina [59]

I would convert to degrees first seems to make it easier.
$\frac{-13 \pi }{5}$ × $\frac{180}{ \pi }$
= -468
by adding 360 twice we get the coterminal angle 252

252 is in the 3rd quadrant so 180 is the closest angle on the x-axis
ref angle = 252 - 180 = 72

If necessary convert back to radians... $72( \frac{ \pi }{180} )= \frac{2 \pi }{5}$

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3 years ago

Help plz I need to fin before today help

Alik [6]

Answer:

BD = 12.1 (nearest tenth)

Step-by-step explanation:

∆ABC is an isosceles triangle, since it has two equal sides, AB and BC. Also, this means that <BAD and <BCD = 60° each.

BD divides ∆ABC into two equal parts.

Apply trigonometric ratio to find BD.

Reference angle = <BAD = 60°

Adjacent = AD = 7

Opposite = BD

Thus, we would have:

tan 60 = opp/adj

Tan 60 = BD/7

7*Tan 60 = BD

12.1 = BD

BD = 12.1 (nearest tenth)

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2 years ago

Nathan bought a pair of boots for $79.95 and 2 shirts for $19.99 each. The sales tax is 7.5%. How much did Nathan pay for all th

Sophie [7]

First, add up his total.
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He had to pay $128.92
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3 years ago

Which expression is equivalent to 7a^2b + 10a^2b^2 + 14a^2b^3?

vladimir1956 [14]

7a^2b + 10a^2b^2 + 14a^2b^3 =
a^2b (7 + 10b + 14b^2) <==

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3 years ago

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Answer:

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