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vladimir1956 [14]
2 years ago
9

The volume Vr (in cubic meters) of a spherical balloon with radius r meters is given by =Vr43πr3. The radius Wt (in meters) afte

r t seconds is given by =Wt+7t3. Write a formula for the volume Mt (in cubic meters) of the balloon after t seconds. It is not necessary to simplify.
Mathematics
1 answer:
Arte-miy333 [17]2 years ago
7 0

Answer:

M_t=\frac{1372}{27}\pi t^9

Step-by-step explanation:

We are given that Volume of spherical balloon in cubic meters

V_r=\frac{4}{3}\pir^3

We have to find the value of volume of the balloon after t seconds.

We are given that radius of spherical balloon after t seconds

W_t=7t^3

Substitute the value then we get

M_t=\frac{4}{3}\pi(7t^3)^3

M_t=\frac{1372}{27}\pi t^9

Hence, the volume of spherical balloon is given by the formula

M_t=\frac{1372}{27}\pi t^9

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State the size of angle OAB, giving a reason for your answer
Alja [10]

Answer:

Angle OAB = 90°

Reason: tangent theorem of a circle

Step-by-step explanation:

The diagram given shows a tangent line of the given circle with center O. The tangent touches the circle at point A.

The diagram also shows the radius of the circle, OA, drawn from the center to the circle to meet at the point of tangency.

Thus, according to the Tangent Theorem of a circle, the point at which the radius drawn from the center meets the point of tangency = 90°. The tangent is perdendicular to the radius drawn to meet at the point of tangency.

Therefore, angle OAB = 90°

5 0
2 years ago
The number of acres in a region cleared for farming follows the formula a = f (t) = 2t2 where t is the number of months since th
Anit [1.1K]

we are given

a=f(t)=2t^2

we can use average rate of change formula from t=a to t=b

A=\frac{f(b)-f(a)}{b-a}

Here, we are given from t=1 to t=4

so, we will get formula as

A=\frac{f(4)-f(1)}{4-1}

now, we can plug values

A=\frac{2(4)^2-2(1)^2}{4-1}

now, we can simplify it

A=10

the average rate of change in the number of acres cleared for farming between t = 1 and t = 4  is 10 acres/ month.............Answer

6 0
2 years ago
Alicia sews costumesfor a school play.She takes an average of 86 minutes to sew each costume.How long would she take to sew 16 o
Goryan [66]

Answer:

1376 minutes

Step-by-step explanation:

Alicia sews costumes for schools

She takes 86 minutes to sew one costume

Therefore the time taken to sew 16 costumes can be calculated as follows

86 mins= 1 costume

x= 16 costume

Cross multiply

x= 86×16

= 1376 minutes

3 0
1 year ago
A partial proof was constructed given that MNOP is a parallelogram. Parallelogram M N O P is shown. By the definition of a paral
viva [34]

Answer: last notation is right N =~ P

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6 0
2 years ago
Read 2 more answers
Wade bicycles at a speed of 10 miles an hour and arrives at his office in only 15 minutes. What is the distance in miles to his
bulgar [2K]

Answer:

The distance to his office is 2.5 miles.

Step-by-step explanation:

Given : Wade bicycles at a speed of 10 miles an hour and arrives at his office in only 15 minutes.

To find : What is the distance in miles to his office?

Solution :

The relationship between distance, speed and time is

\text{Distnace}=\text{Speed}\times \text{Time}

The speed of bicycle is 10 miles per hour.

Time taken is 15 minutes.

Converting into hours,

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15 minute = \frac{15}{60} hours

15 minute = 0.25 hours

Substitute the value sin the formula,

\text{Distnace}=10\times0.25

\text{Distnace}=2.5

Therefore, The distance to his office is 2.5 miles.

4 0
2 years ago
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