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laiz [17]
3 years ago
9

A store decreases the price of an item from 120$ to 96$ what is the percent decrease

Mathematics
2 answers:
a_sh-v [17]3 years ago
8 0
Answer should be a 20% decrease
Paul [167]3 years ago
6 0
The percent of decrease formula is percent of decrease divided by original value. So the equation would be 24/120, which is 20 percent decrease
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Explain the differences (exponents)<br><br> -6^4 and (-6)^4
wel

Step-by-step explanation:

-  {6}^{4}  =  - 1296 \\  \\  (-  {6})^{4}  =  1296

The product of -6^4 is negative whereas the product of (-6) ^4 is positive.

7 0
3 years ago
A chemist is using 336 milliliters of a solution of acid and water. If 19.4 % of the solution is acid, how many milliliters of a
denpristay [2]

Answer:

65.2 milliliters

Step-by-step explanation:

The quantity 336 milliliters is the 100% of the solution. We can represent this information on a table:

Milliliters        Percentage of solution

     336        ⇔            100%

we are told that 19.4% of this solution is acid, and we need to know how many milliliters represents this percentage. I will call the number of milliliters of acid on the solution 'x', and updating the last table:

Milliliters        Percentage of solution

     336        ⇔            100

     x             ⇔            19.4%

We can solve this problem for 'x' using the<u> rule of three</u> which is to multiply the cross quantities on the table (336 by 19.4) and then divide by the remaining amount (100):

x = 336(19.4)/100

x = 6,518.4/100

x = 65.184

which rounding to the nearest tenth is: 65.2 milliliters

8 0
3 years ago
Home heating oil is sold by the gallon. Last winter, the Romano family used 370 gallons of oil at $2.56 per gallon. If the price
belka [17]

Answer:

$1030

Step-by-step explanation:

Last winter:

Total expense = 370 * 2.56 = $947.2

Next year,

price increases 9% per gallon

which means, per gallon cost is $2.7904

Approx. expense = 370 * 2.7904 = $1032.448 which is round down to $1030

4 0
3 years ago
Read 2 more answers
A population of values has a normal distribution with μ = 158.9 μ = 158.9 and σ = 90.4 σ = 90.4 . You intend to draw a random sa
rosijanka [135]

Answer:

P_{39}=133.68    

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 158.9

Standard Deviation, σ = 90.4

We are given that the distribution is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find the value of x such that the probability is 0.39

P( X < x) = P( z < \displaystyle\frac{x - 158.9}{90.4})=0.39  

Calculation the value from standard normal z table, we have,  

\displaystyle\frac{x - 158.9}{90.4} = -0.279\\\\x = 133.6784\approx 133.68  

P_{39}=133.68

133.68 separates the bottom 39% means from the top 61% means.

7 0
3 years ago
Which of the
kondor19780726 [428]

The pic is attached.

7 0
3 years ago
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