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3 years ago

WILL GIVE BRAINLIEST FOR THE RIGHT ANSWER!!

Mathematics

1 answer:

vredina [299]3 years ago

7 0

Answer:

19 gram

Step-by-step explanation:

Formula of mass left after ionising: $\frac{M}{2^{n} }$ where M is original mass and n is half lives.

Using the equation:

$\frac{150}{2^{3} }$ → 18.75

Therefore, 18.75 g left after ionising.

∵ If rounded to nearest gram then 19 gram.

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mrs_skeptik [129]

1) Answer: A

because trangles RST is similar to VUT as:

<RST=<VUT=55 (Angle)

<RTS=<VTU=90 (it seems right angled) Angle

So by AA similarity...(two angles similarity is enough)

2) Answer:B

y+z=x because exterior angle of a triangle (which is x) must be equal to sum of non-adjacent (y and z) interior angles.

3) Answer: A should be right choice. Step 1 is wrong here which is,

m<m + m<n + m<p=180 (wrong)

It should be:

m<m + m<n + m<0=180 (right)

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3 years ago

Tickets to a movie cost five dollars for adults and three dollars for students a group of friends purchase 18 tickets for $82 ho

Dvinal [7]

Answer: They purchased 14 adult tickets and 4 kids' tickets.

Step-by-step explanation:

14 x 5 = 70

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and then add 70 plus 12 to get 82 dollars

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3 years ago

What is the area of the following circle? use 3.14 for pi and label your answer in units squared or square units.

Alenkinab [10]

Answer:

153. 86 units squared

Step-by-step explanation:

3. 14 x 7^2= 153. 86

4 0

3 years ago

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This figure is made up of a quadrilateral and a semicircle.

Arturiano [62]

Answer:

The correct option is B. The area of the figure is 40.4 units².

Step-by-step explanation:

The line AB divides the figure in two parts one is a rectangle and another is semicircle.

The distance formula is

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

The length of AB is

$AB=\sqrt{(2+3)^2+(4-2)^2}=\sqrt{25+4}=\sqrt{29}$

The length of AD is

$AD=\sqrt{(-1+3)^2+(-3-2)^2}=\sqrt{4+25}=\sqrt{29}$

Since AB=AD, therefore ABCD is a square. The area of the of square is

$A_1=a\times a=\sqrt{29}\times \sqrt{29} =29$

The area of square is 29 units².

The area of a semicircle is

$A_2=\frac{\pi}{2}r^2$

Since AB is the diameter of the semicircle, therefore the radius of the semicircle is

$r=\frac{d}{2}=\frac{\sqrt{29}}{2}$

The area of the semicircle is

$A_2=\frac{3.14}{2}(\frac{\sqrt{29}}{2})^2=40.3825$

The area of the figure is

$A=A_1+A_2=29+11.2825=40.3825\approx 40.4$

Therefore the area of the figure is 40.4 units². Option B is correct.

5 0

3 years ago

NEED HELP FAST!

mihalych1998 [28]

The answer is currently A so yep thats the answer ok

8 0

3 years ago

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