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liberstina [14]
3 years ago
11

Help pls i dont have a lot of time

Mathematics
1 answer:
hram777 [196]3 years ago
6 0

Answer:

1. 8 meters

2.1dk

Step-by-step explanation:

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It is impossible to create a square pyramid by rotating a shape about an axis because its base is not ________.
natta225 [31]
It is impossible because it's base is not circular. A solid of revolution is <span>obtained by rotating a </span>plane curve<span> around some </span>straight line, that is, <span>the </span>axis of revolution that lies on the same plane. The closest to a square pyramid applying this concept is by rotating a right triangle around the opposite or adjacent side (the axis), but the shape that you get is a straight circular cone. 
7 0
3 years ago
A company makes steel rods shaped like cylinders. Each rod has a radius of 2 centimeters and height of 70 centimeters. How much
lakkis [162]

Answer:

<em>213,645.6cm³ </em>

Step-by-step explanation:

Area of a cylinder is expressed as;

V = πr²h

r is the radius = 2cm

h is the height = 70cm

Get the volume of one rod;

V = πr²h

V = (3.14)(2)²(70)

V = (3.14)(4)(70)

V = 879.2cm³

one steel = 879.2cm³

243 rods = x

Cross multiply;

x = 879.2 * 243

<em>x = 213,645.6</em>

<em>The company will need 213,645.6cm³ volume of steel to make 243 rods</em>

5 0
3 years ago
Need help asap, will mark brainliest, thanks!
Licemer1 [7]

Answer:

in year 7

Step-by-step explanation:

\frac{2520000}{4000000}  = .63

.63 \times 2520000 = 1587600

4000000( {.63}^{x} ) = 200000

{.63}^{x}  = .05

x = 6.48

So in year 7, the animal would be placed on the endangered species list.

6 0
2 years ago
Prime # between 17 and 23 and its double
Anna11 [10]

A prime number is one that can not be nicely divided by a number besides itself. The one between 17 and 23 is 19 and its double is 38.

6 0
3 years ago
Which is NOT true about a direct proportion?a.Its graph must go through the origin. b.Its graph must be linear c.Its graph must
seropon [69]
The answer is - C. It must have a slope of 11
8 0
3 years ago
Read 2 more answers
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