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seropon [69]
3 years ago
5

A grocery store reduced the price of a loaf of bread from $2.80 to $2.73. Find the percent decrease. Round your answer to one de

cimal place.
Mathematics
2 answers:
MissTica3 years ago
6 0

Answer:

2.6%

Step-by-step explanation:

(2.80-2.73)/2.73

0.07/2.73

0.02564

Convert to Percentage

0.02564 times 100

2.564%

To one decimal place

In rounding up numbers, numbers 1 to 4 are rounded up to zero, while numbers 5 to 9 are rounded up to 1.

To one decimal place, we look at the second decimal place which is 6. Digit 6 is rounded up to 1, which will be added to the first decimal place, 5+1=6

Hence we have 2.6

Answer is 2.6%

Mandarinka [93]3 years ago
3 0

Answer:

2.5%

Step-by-step explanation:

First get the decrease .

The decrease is the difference between the two prices .

Decrease = $2.80 - $2.73

= $0.07

% decrease = decrease/initial price

That’s

% decrease = $0.07/$2.80 x 100%

= 0.025 x 100%

= 2.5%

The percentage decrease is 2.5%

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Nadya [2.5K]
To solve this we are going to use the exponential function: f(t)=a(1(+/-)b)^t
where
f(t) is the final amount after t years
a is the initial amount
b is the decay  or grow rate rate in decimal form
t is the time in years

Expression A 
f(t)=624(0.95)^{4t}
Since the base (0.95) is less than one, we have a decay rate here.
Now to find the rate b, we are going to use the formula: b=|1-base|*100%
b=|1-0.95|*100%
b=0.05*100%
b=5%
We can conclude that expression A decays at a rate of 5% every three months.

Now, to find the initial value of the function, we are going to evaluate the function at t=0
f(t)=624(0.95)^{4t}
f(0)=624(0.95)^{0t}
f(0)=624(0.95)^{0}
f(0)=624(1)
f(0)=624
We can conclude that the initial value of expression A is 624.

Expression B
f(t)=725(1.12)^{3t}
Since the base (1.12) is greater than 1, we have a growth rate here.
To find the rate, we are going to use the same equation as before:
b=|1-base|*100%
b=|1-1.12|*100
b=|-0.12|*100%
b=0.12*100%
b=12%
We can conclude that expression B grows at a rate of 12% every 4 months.

Just like before, to find the initial value of the expression, we are going to evaluate it at t=0
f(t)=725(1.12)^{3t}
f(0)=725(1.12)^{0t}
f(0)=725(1.12)^{0}
f(0)=725(1)
f(0)=725
The initial value of expression B is 725.

We can conclude that you should select the statements:
- Expression A decays at a rate of 5% every three months, while expression B grows at a rate of 12% every fourth months. 

- Expression A has an initial value of 624, while expression B has an initial value of 725.

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2 years ago
Which inequality will have a solid boundary line and a shaded region above its graph?
Alekssandra [29.7K]
A solid line means either ≥ or ≤

So either A or B
 
<span>Above the graph: Must be greater than y

Therefore, the final answer would be letter B:

</span><span>2x − 3y ≤ 3 

I hope my answer has come to your help. God bless and have a nice day ahead!
</span>
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3 years ago
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Answer:

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