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FromTheMoon [43]
3 years ago
14

I NEED HELP ASAP AND WILL GIVE BRAINLIEST !!

Mathematics
1 answer:
CaHeK987 [17]3 years ago
7 0
Correct answer:
r = 1:4

Step-by-step explanation:
a=40
b=10

r=b/a=10/40=0.25

Hope this helps i tried my best
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webassign If a snowball melts so that its surface area decreases at a rate of 6 cm2/min, find the rate at which the diameter dec
drek231 [11]

Answer:

The answer is \frac{3}{10\pi }  cm/min

Step-by-step explanation:

Assuming the snowball is a perfect sphere, then if A denotes the surface area and D the diameter then:

A=4\pi r^{2} = 4\pi (\frac{D}{2} )^{2} =\pi  D^{2}

Differentiating wrt r we have:

\frac{dA}{dD} =2\pi D

We are told that \frac{dA}{dt}= -6 and we want to find \frac{dD}{dt}

By the chain rule we have:

\frac{dA}{dD}=\frac{dA}{dt}.\frac{dt}{dD}=\frac{\frac{dA}{dt} }{\frac{dD}{dt} }

∴2\pi D=-\frac{6}{\frac{dD}{dt} }

∴\frac{dD}{dt}=-\frac{6}{2\pi D}

When D=10 then

\frac{dD}{dt} =-\frac{6}{10*2\pi } =-\frac{3}{10\pi }

The sign (-) shows that the D is decreasing.

3 0
3 years ago
What x^2 x 3x + 1000x please help
Kruka [31]

Answer: x * (x + 1003)

Step-by-step explanation:

x^2 x 3x + 1000x

x^2 + 1003x

x * (x + 1003)

8 0
3 years ago
What is the circumference of the circle below?
vfiekz [6]

Answer:

37.68 cm.

Step-by-step explanation:

In the given figure, the radius of the circle is 6 cm. As we know the formula for Circumference of Circle is 2πr,

= 2×22/7×6cm

= 37.68 cm

8 0
3 years ago
Whig shows the graph of hw solution set of x + 2y > 4?
IceJOKER [234]
I hope my answer is right




6 0
4 years ago
A car salesman earns a base salary plus commission for every car he sells. The expression shows the amount a salesperson earns,
kenny6666 [7]
The car salesman makes a base salary of $2,000. He also gets $1,000 for every car he sells. And it asks us, "<span>How much does he earn for each car sold?"
 
The variable x is how many cars he sold. In this one.

Now the equation is this: 2000 + 1000(1)
Now solve.
2000 = 1000(1) = 2000 + 1000 = 3000

So our car salesman would have made $3,000 in a month.</span>
7 0
3 years ago
Read 2 more answers
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