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Lapatulllka [165]
3 years ago
15

Molly wishes to make a lawn ornament in the form of a solid sphere. The clay being used to make the sphere weighs .075 pound per

cubic inch is the spheres radius 4 inches what is the weight of the sphere to the nearest pound
Mathematics
1 answer:
Serhud [2]3 years ago
5 0
Area of a sphere formula = 4/3 pi x r^3
4/3 pi x 4^3 x 0.075 = 20.106
20.106 rounds to 20 to the nearest pound
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Help me please and thank you​
Snezhnost [94]

Answer:

Option 1

Step-by-step explanation:

If you multiply all the numbers, you get

7.5= 7500

5.6=5600

2.5=2500

6 0
3 years ago
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A sugar molecule with 45 atoms has twice as many atoms of hydrogen as
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C
pls dont get mad if its wrong
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3 years ago
Find the surface area of the composite solid. Round your answer to the nearest hundredth.
horrorfan [7]

Answer:

The answer is

A. 529.66 ft²

Step-by-step explanation:

The picture of the composite figure is not given,

But find attached the figure.

The composite consists of two solid shapes

1. Cylinder

2. Rectangular prism

To solve for the total surface area of the composite

Let us solve for the total surface area of the cylinder

Given radius r= 4ft

Height h=5ft

A= πr²+2πrh-πr²

N/B we subtracted the second circular surface since it is joined to the rectangular prism

A= 3.142*4²+2(3.142)*4*5-3.142*4²

A= 50.272+125.68-50.272

A=125.68ft²

We proceed to find the area of the rectangular prism

We know that the prism has 6 sides

Hence area

A= 2(11*6)+ 2(8*6)+2(11*8)

A= 132+96+176

A= 404ft²

Hence total surface area is

404+125.68= 529.68ft²

7 0
3 years ago
The sum of two numbers is 91. if three times the smaller number is subtracted from the larger​ number, the result is 7.7. find t
morpeh [17]


if x is the bigger num and y is the smaller

x + y = 91
x - 3y = 7.7

multiply by -1

x+y = 91
-x + 3y = -7.7

add the equations

4y = 91 - 7.7
4y = 83.3
y = 20.825

then x+y = 91 use to find x

x+20.825 = 91
x = 70.175

the two numbers are 70.175 and 20.825
5 0
3 years ago
Which choice correctly explains which product is the better buy? Coffee Brand A is sold for $6.99 per pound Coffee Brand B is so
Valentin [98]

Answer: Choice B

Coffee Brand A is a better buy because its unit rate is $0.44 per ounce

=======================================================

Explanation:

Brand A is sold for $6.99 per pound, which is the same as saying $6.99 per 16 ounces. The unit rate is 6.99/16 = 0.436875 = 0.44 dollars per ounce

Brand B is sold for $5.69 for 12 ounces. The unit rate is  5.69/12 = 0.47416 = 0.47 dollars per ounce

Brand A is cheaper per ounce compared to brand B.

------------------

Here's another way we can look at it

Brand A is $6.99 per 16 ounces. We can set up the equation below

6.99 dollars = 16 ounces

then divide both sides by 16 to turn "16 ounces" into "1 ounce"

So,

6.99 dollars = 16 ounces

6.99/16 dollars = 16/16 ounces

0.436875 dollars = 1 ounce

0.44 dollars = 1 ounce

is the unit rate for brand A.

Similar steps would happen with brand B as well.

5 0
3 years ago
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