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galina1969 [7]
4 years ago
11

Find the volume v of the described solid s. a right circular cone with height 7h and base radius 3r

Mathematics
1 answer:
jarptica [38.1K]4 years ago
7 0
Answer in cm if you need something else state it in the question.

r = 3 cm
h = 7 cm
s = 7.61577 cm
V = 65.9734 cm³
L = 71.777 cm²
B = 28.2743 cm²
A = 100.051 cm²

Agenda:

r = radius
h = height
s = slant height
V = volume
L = lateral surface area
B = base surface area 
A = total surface area
π = pi = 3.14159
<span>√ = square root
</span>
Formula: Volume of a cone: V = (1/3)πr²h
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Step-by-step explanation:

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6 0
3 years ago
At 1:00 p.m. a car leaves st. louis for chicago, traveling at a constant speed of 65 miles per hour. at 2:00 p.m. a truck leaves
Maurinko [17]
Let x =  miles traveled by car
Let y = miles traveled by truck.

Because the total distance is 305 miles,
x + y = 305       (1)

Let t = hours of travel by truck. Because the truck speed is 55 mph,
55*t = y            
or 
t = y/55              (2)

The car has an hour head start, therefore it travels for (t + 1) hours.
Because the car travels at 65 mph,
65*(t + 1) = x
Substitute (2) to obtain
65*(y/55 + 1) = x
or
1.1818y + 65 = x        (3)

From (1), obtain
1.1818y + 65 = 305 - y
2.1818y = 240
y = 110
x = 305 - y = 195

From (2),
t = 110/55 = 2 hours

The two vehicles pass each other at 2:00 pm + 2 hours  = 4:00 pm

Answer: 4:00 pm
8 0
4 years ago
What is the solution to the system of equations? Use the substitution method. {y=−2x+53x−4y=2 Enter your answer in the boxes.
Jet001 [13]
We have the following system:
 y = -2x + 5
 3x-4y = 2
 Substituting y in equation 2 we have:
 3x-4 (-2x + 5) = 2
 We clear x:
 3x + 8x - 20 = 2
 11x = 2 + 20
 x = 22/11
 x = 2
 Then, we substitute x = 2 in equation 1:
 y = -2 (2) +5
 y = -4 + 5
 y = 1
 Answer:
 
The solution to the system of equations is:
 
x = 2
 
y = 1
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4 years ago
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4 0
2 years ago
A linear function contains the following points. (0,-4) (4,4) What are the slope and y-intercept of this function?​
galben [10]

Answer:

slope = 2

y-intercept= -4

Step-by-step explanation:

slope = y2- y1/ x2-x1

slope = 4-(-4) / 4-0

slope = 2

using (4,4) for (x,y)

y= mx+b

4= 2(4)+b

b= -4

6 0
3 years ago
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