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Mamont248 [21]
2 years ago
7

According to the rules of significant figures, what is the correct answer to 3.4 x 5

Mathematics
1 answer:
maksim [4K]2 years ago
4 0
Your answer will be 17 hope this helps :)
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The blue figure is rotated 90° counterclockwise around the origin and then reflected across the x-axis. In which quadrant will t
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Answer:

the answer is B the image will be in quadrant III

Step-by-step explanation:

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3 years ago
At 2:00 p.m. two cars start toward each other from towns that are 240 miles apart. The rate of one car is 15 mph faster than the
Vesnalui [34]

Hello! :)

The <u>answer</u> is x+15!

~Hope it helps!~ :)

3 0
2 years ago
a regular rectangular pyramid has a base and lateral faces that are congruent equilateral triangles. it has a lateral surface ar
Margarita [4]
A pyramid is regular if its base is a regular polygon, that is a polygon with equal sides and angle measures.
(and the lateral edges of the pyramid are also equal to each other)

Thus a regular rectangular pyramid is a regular pyramid with a square base, of side length say x.

The lateral faces are equilateral triangles of side length x.

The lateral surface area is 72 cm^2, thus the area of one face is 72/4=36/2=18  cm^2.

now we need to find x. Consider the picture attached, showing one lateral face of the pyramid.

by the Pythagorean theorem: 

h= \sqrt{ x^{2} - (x/2)^{2}}= \sqrt{ x^{2}- x^{2}/4}= \sqrt{3x^2/4}= \frac{ \sqrt{3} }{2}x

thus, 

Area_{triangle}= \frac{1}{2}\cdot base \cdot height\\\\18= \frac{1}{2}\cdot x \cdot \frac{ \sqrt{3} }{2}x\\\\ \frac{18 \cdot 4}{ \sqrt{3}}=x^2

thus:

x^2 =\frac{18 \cdot 4}{ \sqrt{3}}= \frac{18 \cdot 4 \cdot\  \sqrt{3} }{3}=24 \sqrt{3}       (cm^2)

but x^{2} is exactly the base area, since the base is a square of sidelength = x cm.


So, the total surface area = base area + lateral area =  24 \sqrt{3}+72   cm^2


Answer: 24 \sqrt{3}+72   cm^2

4 0
2 years ago
Mary is 6 years older than Het sister jelly.The sum of their ages is 48.how to kid is jelly?
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Jelly is 21 years old.
3 0
3 years ago
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If 4 cups of water ran down the drain everyday, how many gallons would be lost over a year?
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There are 365 days in a year, 365 multiplied by 4 cups a day... the answer is 1,460 cups went down the drain in a year.
Here, hope this helps :)
6 0
3 years ago
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