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blondinia [14]
3 years ago
13

Lucas built a composite solid by joining 12 identical blocks, with dimensions 4 inches by 5 inches by 7 inches, into three

Mathematics
1 answer:
romanna [79]3 years ago
6 0

Answer:

the correct answer is b .

Step-by-step explanation:

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The height of a can is 3 times its radius. If the radius of the can is 3 centimeters, what is the volume?
Semmy [17]

Answer:

<em>170 </em>cent.^{3}<em />

Step-by-step explanation:

If the height is 3 times the radius you can find that by: 3r

r = 3.

So: 3 x 3 = 9

The height is 9 centimeters

Volume of a cylinder (can):

V= 2\pi rh

Plug in what we know

V = 2 \pi (3) (9)\\V = 54\pi \\V = 169.646\\

Rounds to: 170

7 0
3 years ago
The bill at a restaurant is $58.50 and mrs Johnston wants to leave a 15% tip approximately how much money should she leave
qaws [65]

Answer:

the total for her to leave is 67.28 dollars. the tip is 8.78 dollars

Step-by-step explanation:


8 0
3 years ago
On a certain hot​ summer's day, 189 people used the public swimming pool. The daily prices are $1.50 for children and $2.25 for
serious [3.7K]

Answer: x children and (481-x) adults.

1.25x +2.25(481-x) = 865.25

1.25x +1082.25 -2.25x =865.25

x= 217

so 217 children and 481-217 = 264 adults

hope this helped <333

5 0
3 years ago
If (7,2) is an ordered pair of the function f(x), which of the following must be an ordered pair of the inverse of f(x)?
Wewaii [24]
The inverse is basically switc x and y

so if (a,b) is a point on f(x), then (b,a) is on th inverse

(7,2) is on it so on inverse, (2,7) has to be on it


C
5 0
3 years ago
Read 2 more answers
How do you find the area of a composite figure?
Orlov [11]

Answer:

See below.

Step-by-step explanation:

Top prism:

To find the volume of the top prism, multiply the area of the base by the height. This is 1/2 times width times height times length.

V =1/2 l*w*h =1/2* 3*2.8*8 = 33.6

To find the surface area of a prism, find the area of the triangular base and the area of each rectangular side.

Area of the base is A = 1/2 * b*h = 1/2 * 3 * 8 = 12. Since there are 2 bases, the area is 24.

Area of the rectangular side is A = b*h = 2.8*5 = 14. Since there are two, the area is 2*14 = 42.

The surface area of the prism is 24 + 28 = 52.

Bottom prism:

To find the volume of the bottom prism, multiply the width times the height times the length.

V = l*w*h = 8*2.8*4.8 = 107.52

To find the surface area of the bottom prism, find the area of the base and each side of the house.

A = 8*2.8 = 22.4

A = 8*4.8 = 38.4 which occurs twice so it has a total area of 76.8

A = 2.8*4.8 = 13.44 which occurs twice so it has an area of 26.88.

The total volume is 33.6 + 107.52 = 141.12

The total surface area is 52 + 22.4 + 76.8 + 26.88 = 178.08

6 0
3 years ago
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