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3 years ago

Someone help me plz?

Mathematics

2 answers:

Nikitich [7]3 years ago

8 0

Last one

They already know the distance from Tamsin's house to school and the distance from her house to Eric's bus stop

Marina CMI [18]3 years ago

4 0

Answer:

Distance

Step-by-step explanation:

Distance is unknown in the given situation.

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10 POINTS<br> Find the surface area of the regular pyramid. Round to the nearest tenth if necessary.

NNADVOKAT [17]

Answer:

$SA=234.8\ yd^2$

Step-by-step explanation:

we know that

The surface area of the regular pyramid is equal to the area of the triangular base plus the area of its three triangular lateral faces

step 1

Find the area of the triangular base

we know that

The triangular base is an equilateral triangle

The area applying the law of sines is equal to

$A=\frac{1}{2}(14^2)sin(60^o)$

$A=\frac{1}{2}(196)\frac{\sqrt{3}}{2}$

$A=49\sqrt{3}=84.87\ yd^2$

step 2

Find the area of its three triangular lateral faces

$A=3[\frac{1}{2}bh]$

we have

$b=14\ yd$

Find the height of triangles

Applying the Pythagorean Theorem

$10^2=(14/2)^2+h^2$

solve for h

$100=49+h^2$

$h^2=100-49$

$h=\sqrt{51}\ yd$

substitute

$A=3[\frac{1}{2}(14)\sqrt{51}]$

$A=149.97\ yd^2$

step 3

Find the surface area

Adds the areas

$SA=84.87+149.97=234.84\ yd^2$

Round to the nearest tenth

$SA=234.8\ yd^2$

5 0

3 years ago

Read 2 more answers

A. How long does the piece of wire need to be to make the shape? Explain.

Misha Larkins [42]

A. The wire needs to be 138.226 cm long but already 34.5565 cm of the circle has been covered.

B. To determine the length of the wire needed, we subtract a quarter of the circles circumference from its whole circumference.

Step-by-step explanation:

Step 1:

The circumference of a circle is obtained by multiplying the radius with 2π.

The circumference of a circle $= 2 \pi r.$

Here the radius of the circle is 22 cm but already a quarter of the circumference has been covered with wire.

Step 2:

So to determine the length of the wire needed, we subtract a quarter of the circles circumference from its whole circumference.

So the circumference of the circle $= 2(3.1415)(22) = 138.226$ cm.

$\frac{3}{4} (138.226) = 103.6695$ cm and $\frac{1}{4}(138.226) = 34.5565$ cm.

So the wire needs to be 138.226 cm long but already 34.5565 cm of the circle has been covered. An additional 103.6695 cm of wire is needed to cover the remaining circle.

7 0

3 years ago

Please help, if you answer thanks :) will mark brainliest

nignag [31]

I believe the correct answer is C.

5 0

4 years ago

Due to changing wind conditions, a pilot is able to fly 150 mph for the first third of the flying time of a trip, 175 mph for th

Tema [17]

Answer:

172 mph

Step-by-step explanation:

You're welcome :)

3 0

3 years ago

Read 2 more answers

At noon, the shadow of a flagpole is 10 feet long. At the same time, the shadow of a 140-foot tall building is 60 feet long. Wha

Free_Kalibri [48]

10=2x5
60=2x2x3x5

2x2x5x3=60

i think to do this you need lcm but im not sure

6 0

3 years ago