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Katarina [22]
3 years ago
8

The regular price of an item is $84. The item was on cell with a discount of $12 what is the discount rate

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
4 0

Answer:

<em>The discount is 14.3%.</em>

Step-by-step explanation:

Regular price: $84

Discount: $12

We need to find what percent of $84 is $12.

To find what percent a part is of a whole, divide the part by the whole and multiply by 100.

12/84 * 100% = 14.2857...%

Answer: 14.3%

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Write the expression 12^-2 in simplest form.
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Step-by-step explanation:

1/12^2 = 1/144

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A radioactive substance decays exponentially. A scientist begins with 190 milligrams of a radioactive
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Answer: 65.1 (mg)

Step-by-step explanation:

y=190*e^{-a*t}\\\\Calculate\ a:\\\\t=33,y=95(mg)\\\\190*e^{-a*33}=95\\\\e^{-a*33}=0.5\\\\-a*33=ln(0.5)\\\\a=\dfrac{ln(\dfrac{1}{2}) }{-33} \\\\a=0,02100... \approx{0.021}\\\\If\ t=51\ h, y=190*e^{-0.02100*51}=65.09167...\approx{65.1}

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3 years ago
Explain how you can tell that 31/33 is in simplest form
shtirl [24]
Well 31 is not able to go any were and it has to stay 31
3 0
3 years ago
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Naomi pays $1.50 each time she rides the city bus. She has already ridden the bus 18 times so far this year. The expression repr
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Answer:

$27

Step-by-step explanation:

18 times $1.50 = 27 dollars a year

5 0
3 years ago
the variables x and y have a proportional relatinship and y=2/5 when x=5/8 which equation represents this relationship
mafiozo [28]

The equation is y = 16/25 x

lets find the proportional relationship,

y = kx

2/5 = k * 5/8

k = (2/5) /  (5/8)

k = 16/25

so if k, constant is 16/25

equation is:

y = 16/25 x

<h3>What are proportional relationships?</h3>

Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is know as the "constant of proportionality".

<h3>How do you find the proportional relationship in an equation?</h3>

The equation that represents a proportional relationship, or a line, is y = k x , where is the constant of proportionality. Use k = y x from either a table or a graph to find k and create the equation.

To learn more about proportional relationship from the given link

brainly.com/question/2143065

#SPJ4

6 0
1 year ago
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