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yuradex [85]
3 years ago
6

Find the volume of the triangular prism.

Mathematics
1 answer:
krok68 [10]3 years ago
4 0
Approximately 673.76
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The altitude of a triangle is increasing at a rate of 1 cm/ min while the area of the triangle is increasing at a rate of 2 cm2
serg [7]
Ya, calculus and related rates, such fun!




everything is changing with respect to t

altitude rate will be dh/dt and that is 1cm/min
dh/dt=1cm/min

area will be da/dt which is increasing at 2cm²/min
da/dt=2cm²/min

base=db/dt

alright

area=1/2bh
take dervitivie of both sides
da/dt=1/2((db/dt)(h)+(dh/dt)(b))
solve for db/dt
distribute
da/dt=1/2(db/dt)(h)+1/2(dh/dt)(b)
move
da/dt-1/2(dh/dt)(b)=1/2(db/dt)(h)
times 2 both sides
2da/dt-(dh/dt)(b)=(db/dt)(h)
divide by h
(2da/dt-(dh/dt)(b))/h=db/dt

ok
we know
height=10
area=100
so
a=1/2bh
100=1/2b10
100=5b
20=b

so
h=10
b=20
da/dt=2cm²/min
dh/dt=1cm/min

therefor
(2(2cm²/min)-(1cm/min)(20cm))/10cm=db/dt
(4cm²/min-20cm²/min)/10cm=db/dt
(-16cm²/min)/10cm=db/dt
-1.6cm/min=db/dt

the base is decreasing at 1.6cm/min
4 0
3 years ago
-3x2( 7x2 - x + 4)<br> What is the answer
Lerok [7]

Answer:

6x-108

Step-by-step explanation:

-3 · 2(7 · 2 - x + 4)

= ((−3)(2))((7)(2) +− x + 4)

= −84 + 6x − 24

= 6x − 108

The answer is 6x - 108

6 0
3 years ago
Help me with these questions circled
Vaselesa [24]
61.

40 ==> 100 %
x   ==> 15 %

15*40/100 = 6.

Therefore, merely 6 students received C grades.

62.

23 500 ==> 100%
x          ==> 42 %

42*23500/100 = 9870

Therefore 9870 people in the town are over 45 years of age.

You continue wth this method and you'll find for the 63, 64, 65.

In maths, you have to understand what you're doing dude ^^.

Whatever the answer for 64 and 65 are 

64.

21.50*20/100 = 4.3

65. 

250 ==> 100 %
45 ==> x %

x = 45*100/250 = 18 %

i will let you do the 63 alone, give me what you have found in the comments, i'll verify your answer.

Hope this helps !

Photon
7 0
3 years ago
In which quadrant of the coordinate plane is the point (−4,1) located
Evgesh-ka [11]

Answer:

Quadrant II

Step-by-step explanation:

Below will be a picture provided to show you which quadrants are in a coordinate grid.

To graph (-4, 1) we will start at the origin, go 4 units to the left and 1 unit up.

As you can see in the image, it will be plotted in quadrant 2.

Best of Luck!

8 0
3 years ago
Read 2 more answers
One number is 32 less than another number. If the sum of the two numbers is 92​, find the two numbers
Aleks04 [339]
<h3>Assumption:</h3>

let the number be x, so that the two numbers are x and x - 32

<h3>Solution:</h3>

x + x - 32 = 92

or, 2x = 92 + 32

or, 2x = 124

or, x = 124/2 = 62

<h2>Answer:</h2>

The first number is x = <u>62.</u>

The second number is x - 32 = 62 - 32 = <u>30</u><u>.</u>

4 0
3 years ago
Read 2 more answers
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