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Galina-37 [17]
3 years ago
13

What is the volume of a hemisphere with a diameter of 3.8 in, rounded to the nearest tenth of a cubic inch?

Mathematics
1 answer:
Natali5045456 [20]3 years ago
6 0

Answer:14.4In^3

Step-by-step explanation:

Diameter=3.8In

radius(r)=3.8 ➗ 2=1.9In

volume of hemisphere=2/3 x π x r^3

Volume=2/3 x 3.14 x(1.9)^3

Volume=2/3x3.14x1.9x1.9x1.9

Volume=(2x3.14x1.9x1.9x1.9) ➗ 3

Volume=43.07452 ➗ 3

Volume=14.4In^3

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The distance between the cities Chicago and Toronto is 540 miles. A motorcycle's speed is 48 mph. For a car, it takes 2.25 hours
serious [3.7K]

Answer:

5 hours

Step-by-step explanation:

given :

Distance between the cities = 540 miles

Speed of motorcycle =48 mph

TO CALCULATE THE TIME TAKEN BY MOTORCYCLE TO COVER THE TOTAL DISTANCE WE USE THE FORMULA :

\frac{DISTANCE}{SPEED}

By putting given values in the formula we get :

\frac{540}{48}

= 11.25 hours

Now, We are given that for a car to cover the same distance it takes 2.25 hours less than the time taken by motorcycle

⇒ 11.25 hours - 2.25 hours

⇒ 9 hours

Thus , Time taken by car to cover the same distance is 9 hours .

Now to calculate speed of car by using formula:

\frac{distance}{time}

\frac{540}{9}

= 60 mph

Let t be the time taken to meet if they start moving towards each other.

So distance covered by motorcycle in t hours is

speed\times time

= 48t miles

Distance covered by car in t hours is

speed\times time

= 60t miles

⇒ 60t + 48t =540

⇒ 108t = 540

⇒ t= 5 hours

Therefore, time taken to meet if they start moving towards each other is 5 hours.





7 0
4 years ago
Simplify the algebraic expression.<br> 6n+5(10n-7)
kherson [118]

Answer:

56n - 35

Step-by-step explanation:

6n + 5(10n - 7) ← multiply each term in the parenthesis by 5

= 6n + 50n - 35 ← collect like terms

= 56n - 35

4 0
2 years ago
Read 2 more answers
35 points<br> What is an approximate average rate of change of the graph from x = 8 to x = 13
Ghella [55]
Rate of change is -2 because you can do rise over run to find the constant rate of change, and since you are going down you have a negative slope. 
4 0
3 years ago
Please help with this thank you
RUDIKE [14]

1/4 is 25 percent so it is still 40.00

6 0
2 years ago
I’m having a hard time with finding the angles
MakcuM [25]

Answer:

I don't know angles at all please ask your teacher for help...

Step-by-step explanation:

5 0
3 years ago
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