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son4ous [18]
3 years ago
14

If 4 T-shirts cost $15, how much will 12 T-shirts cost?

Mathematics
2 answers:
tatuchka [14]3 years ago
6 0

Answer: $45

Step-by-step explanation:

15/4 = 3.75

Each shirt costs $3.75

3.75 * 12 = 45

emmainna [20.7K]3 years ago
4 0

Answer:

45

Step-by-step explanation:

15 divided by 4 give cost of each shirt, which is $3.75

Then, multiply 3.75 , which gives you 45

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$800 principal earning 7%, compounded annually, after 4 years
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800(1+7)∧4
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A county's population in 1991 was 147 million. In 1998 it was 153 million. Estimate the population in 2017 using the exponential
aliina [53]
Let t=number of years since 1991.
Then 
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3 years ago
The voltage V in a simple electrical circuit is slowly decreasing as the battery wears out. The resistance R is slowly increasin
hoa [83]

Answer:

\frac{dI}{dt}=-0.00016 A/s

Step-by-step explanation:

We are given that

By ohm's law

V=IR

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I=0.03 A

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\frac{dR}{dt}=0.07ohm/s

We have to find rate of change of current I means \frac{dI}{dt}

Differentiate the equation w.r.t t

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Substitute the values then we get

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\frac{dI}{dt}=\frac{-0.0621}{389}=-0.000160 A/s

Hence, the current I is changing at the rate=-0.00016A/s

4 0
3 years ago
Each month, Arnold receives $1,050 for working part time at his uncle’s camera store. For each camera that he sells, he earns a
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Answer:

$1,050*125x=P(x). I just need more characters.

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3 years ago
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