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Pavel [41]
3 years ago
12

By switching service providers, a family's telephone bill decreased from about $50 a month to about $47 a month. What was the pe

rcent decrease?
Mathematics
2 answers:
AysviL [449]3 years ago
5 0
100 divided by 50 is 2. 
So multiply the change by 2, so 2 times 3. 

Answer is 6 percent.
Nataly_w [17]3 years ago
5 0
The answer is by 6 percent
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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 is 0.6767 as a simplified fraction
vodka [1.7K]

Answer: 6767/10000

Step-by-step explanation:

Just simplify it by its nearest tenth

6 0
3 years ago
Help with this question anyone?
Art [367]
Adding 49 will explain it properly just do that and you will get the answers
6 0
3 years ago
The product of a real number and another real number that is 6 less than the first equals 6. What are the numbers?
malfutka [58]
1? Or dividend or multiplication
5 0
2 years ago
Read 2 more answers
Cuál es el valor que tiene x
salantis [7]

Answer:

I might be wrong double check but it's something like

Step-by-step explanation:

4x/3-40/3

(not to sure on that so don't be mad if it's wrong)

6 0
3 years ago
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