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3 years ago

Is 1/4 of a circle a polygon? Explain.

1 answer:

5 0

A polygon is a plane figure with at least three straight sides and angles, and typically five or more. In other words, a polygon is a 2 dimensional shape with straight sides. No curves!

A quarter of a circle has a curve on one side, and is therefore not a polygon.

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An electrician charges a $20 house call fee plus $30 per hour of work. Which equation represents this relationship?An electricia

Brums [2.3K]

Answer:

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3 years ago

Help me plz and thank you

Hitman42 [59]

$1) \: 21 + 35.$

$2) \: 5.$

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3 years ago

Read 2 more answers

Solve exponential equation with different bases:<br> 17^j=16

Rasek [7]

Answer:{−17}. In Example 1, we were able to write the left and right sides of the equation with a common base. ... To solve such an equation, we can take a logarithm of the same base on ... Steps to Solve Exponential Equations by Using Logarithms ... of x is a solution to the logarithmic equation. 35. log2(x − 31) = 5 − log2 x a. x = 16.

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3 years ago

You have 80 grams of a radioactive kind of vanadium. How much will be left after 48 days if it’s half-life is 16 days?

Tresset [83]

10 grams Vanadium will be left after 48 days

Further explanation:

Half-life is the time after which the chemical is reduced to half.

The reaming mass after half life is given by:

$mass\ fater\ half\ life=\frac{Original\ mass}{2}$

The formula for calculating the remaining mass after given time period is:

$Remaining\ substance=\frac{1}{2^n}*mass$

Here n is the number of half lives passed

Now,

Given

Mass=80 grams

Time= 48 days

Half-life = 16 days

The number of half lives will be:

$n=\frac{48}{16}=3$

Putting the values of n and mass in the formula

$Remaining\ substance=\frac{1}{2^3}*80\\=\frac{1}{8}*80\\=10\ grams$

10 grams Vanadium will be left after 48 days

Keywords: Half-life, radioactive

Learn more about half-life calculation at:

#LearnwithBrainly

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3 years ago

Help with this math

yan [13]

13. Four observations:

1. m<SWT = 90° (given)

2. QW = TW (given)

3. m<RWS = m<UWV (vertical angle pair)

4. m<RWU = 180° (straight angle)

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3 years ago