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Pie
3 years ago
8

Help pls fast it is urgent​

Mathematics
1 answer:
quester [9]3 years ago
5 0

Answer:

The volume formula is pi r^2h because it is similar to the formula to the area of a circle with an extra addition of the height variable, since a cylinder is just a circle with depth. The surface area formula is 2pirh +2pi r^2 because it measures the area of both circles as well as the depth. This formula is similar to the circumference formula of a circle.

Step-by-step explanation:

Mark me brainliest pls

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How to solve these question?
mart [117]
3.) An extreme value refers to a point on the graph that is possibly a maximum or minimum. At these points, the instantaneous rate of change (slope) of the  graph is 0 because the line tangent to the point is horizontal. We can find the rate of change  by taking the derivative of the function.

y' = 2ax + b

Now that we where the derivative, we can set it equal to 0.

2ax + b = 0

We also know that at the extreme value, x = -1/2. We can plug that in as well.

2a (-\frac{1}{2} ) + b = 0

The 2 and one-half cancel each other out.

-a + b = 0

a = b

Now we know that a and b are the same number, and that ax^2 + bx + 10 = 0 at x = -1/2. So let's plug -1/2 in for x in the original function, and solve for a/b.

a(-0.5)^2 + a(-0.5) + 10 = 0

0.25a - 0.5a + 10 = 0

-0.25a = -10

a = 40

b = 40

To determine if the extrema is a minima or maxima, we need to go back to the derivative and plug in a/b.

80x + 40

Our critical number is x = -1/2. We need to plug a number that is less than -1/2  and a number that is greater than -1/2 into the derivative.

LESS THAN:
80(-1) + 40 =  -40

GREATER THAN:
80(0) + 40 = 40

The rate of change of the graph changes from negative  to positive at x = -1/2, therefore the extreme value is a minimum.

4.) If the quadratic function is symmetrical about x = 3, that means that the minimum or maximum must be at x = 3.

y' = 2ax + 1

2a(3) + 1 = 0

6a = -1

a = -1/6

So now plug the a value and x=3 into the original function to find the extreme value.

(-1/6)(3)^2 + 3 + 3 = 4.5

The extreme value is 4.5


7 0
3 years ago
Is the underlined verb in the sentence regular or irregular?  We arrived early to our football game last night.   A. irregular  
lapo4ka [179]
Regular verb in that sentence
6 0
3 years ago
Read 2 more answers
Perform the indicated operation. -8 + (-4)
Lostsunrise [7]

It is -12, negative + negative is Negative unless if its with a positive it will cancel out

ex, -12 + 6= -6

3 0
3 years ago
In algebraic expression<br><br> Three-fourths the square of a number.
allsm [11]

Answer:

3/4x^2

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
The cost of 19/4 metres of wire is rs. 171/2.find the cost of 1 meter of the wire​
sveta [45]

Answer:

if 19/4 meter (assuming 4.75) of wire = rs, then (where w is a meter of wire)

4.75w = rs,

w = 4rs / 19

one meter of wire = 4rs / 19

Step-by-step explanation:

8 0
3 years ago
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