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Tatiana [17]
3 years ago
5

8- (0.75+2). Plzzz explain it

Mathematics
1 answer:
frosja888 [35]3 years ago
3 0

Answer:

5.25

Step-by-step explanation:

ok so first you add 0.75+2 which is equal to 2.75

and now you will have 8-2.75 which is equal to 5.25

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What are the x and y- intercepts for the line 4(y+3)=−2(x+6)?
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Muhammad cashed a check from his uncle. He then spent $7.40 on taxis and $40.20 at the restaurant. He deposited the $97.75 he ha
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3 years ago
Stephanie has an aquarium that is in the shape of a right rectangular prism, 50 centimetres long, 25 centimetres wide and 30 cen
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To solve this, we are going to use the volume formula for a rectangular prism: V=lwh
where 
V is the volume of the prism 
l is the length of the prism 
w is the width of the prism 
h is the height of the prism 

We are also using the volume of a sphere formula: V= \frac{4}{3}  \pi r^{3}
where 
V is the volume of the sphere 
r is the radius of the sphere 

Part A: Since she <span>wants a layer of marbles in the bottom of the tank about 5 centimeters deep, the height of this little rectangular prism will be 5 centimeters, so </span>h=5. Since the other measures of our little rectangular prism are the same as the aquarium, l=50 and w=25. Lets replace those values in our volume formula:
V=lwh
V=(50)(25)(5)
V=6250 cm^{3}
Now that we know that she wants to cover a volume of 6250 cm^{3} with marbles, lets find the volume of each marble.
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V= \frac{4}{3} \pi r^{3}
V= \frac{4}{3}  \pi (0.5)^{3}
V=0.52 cm^{3}
Now, let x the number of marbles she will need to cover a volume of 6250 cm^{3}:
0.52x=6250
x= \frac{6250}{0.52}
x=12019.23
Since we know that each bag of marbles has 500 marbles, we are going to divide the number of marbles she will need by the number of marbles in each bag:
\frac{12019.23}{500} =24.03

We can conclude that to fill a layer of 5 cm with marbles, she will need 24 bags of marbles.

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h=17cm
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V=lwh
V=(50)(25)(17)
V=21250cm^{3}
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We can conclude that there are 21.25 liters of water in the tank.
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Yes, because she can do 120 in four minutes and in one minute she can do 30 and 120 plus 30 is i fifty
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