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3 years ago

An item that was selling 72 is reduced to 60. Find the recent decrease in price. Round you answer to the nearest tenth.

Mathematics

1 answer:

Lubov Fominskaja [6]3 years ago

8 0

You need to find what percentage the difference is of 72.

First, subtract 60 from 72:

72-60=8

Next, divide 8 by 72:

8/72=0.1111

To convert this decimal to a percentage, multiply it by 100:

100*0.1111=11.11

The percent decrease is 11.11%.

Hope this helps!!

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Research scientists need a certain type of bacteria to conduct an experiment. There are 2,500 bacteria in a certain culture. The

pychu [463]

Answer:

7 days

Step-by-step explanation:

At 25% per day, it will take approximately 3 days to double the population, so approximately 6 days for the population to quadruple. Checking that number, we find it is not quite enough for the experiment, so another day is required.

"Guess and check" as a method of solution works especially well if you have an automated checker to evaluate your guess. A graphing calculator or spreadsheet can work well for this.

_____

We guess 3 days as the doubling time using the "rule of 72" that says the product of percentage and doubling time is about 72. That is, 72/25 ≈ 3. (This is only a very rough approximation of doubling time, best for rates near 8%.)

7 0

3 years ago

Larina received a 50$ gift card to an online store. She wants to purchase some bracelets that cost 8$ each. There will be an ove

Strike441 [17]

8n+10=50 <-- Original Equation

8n=40 <-- Use the Subtraction Property of Exponents to remove the 10 from the left

n=5 <-- Use Division Property of Exponents to remove the 8 from the n and find the unit of n

The number of bracelets Larina can purchase is five.

5 0

4 years ago

Solve the equations for points!! <br><br> (Only 3)

jonny [76]

Answer:

-2 , -10 & -99

Step-by-step explanation:

⇒ x + 6 = 4

⇒ x = 4-6

⇒ x = (-2)

⇒x - (-4) = -6

⇒ x + 4 = -6

⇒ x = -6-4

⇒ x = -10

⇒2(x-1) = -200

⇒ x - 1 = -200/2

⇒ x - 1 = -100

⇒ x = 1 - 100

⇒ x = (-99)

4 0

3 years ago

Read 2 more answers

Bill had $5.42 and earned 2.25 he spent $3.78 how much did he have left

inna [77]

Answer:

3.89

Step-by-step explanation:

5.42+2.25=7.67

7.67-3.78=3.89

Hope this helps

8 0

3 years ago

What conclusion can be made based on this multiplication problem?

Mademuasel [1]

Answer: Your answer is D

Step-by-step explanation: pls mark me as brainiest and 7 x 3 = 21 or 21 / 3 = 7

4 0

3 years ago