Alicia estimated that the number of horses living in a stable was 26. The actual number of horses living in the stable was 30.What is the percent error in Alicia’s estimate? If necessary, round to the nearest percent.

Answers

Answer 1

Answer: $\%\text{error}=\frac{|\text{estimated value}-\text{actual value}|}{\text{actual value }}\cdot100\%\n\n\%\text{error}=(|26-30|)/(30)\cdot100\%\n\%\text{error}=(|-4|)/(30)\cdot100\%\n\%\text{error}=(4)/(30)\cdot100\%\n\%\text{error}\approx13\%$

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What is the value of -|65.6|

Answers

-65.6
Explanation:
The I I signs (forgot how they are called XD) made the number 65.6, but the negative sign outside the I I made the number -65.6

The answer is -65.6 because the negative sign is on the out side of the absolute value signs.

Jackie wants to buy a digital camera that sells for $250. She has $120 saved. What percent of the cameras price has she saved?

Answers

Answer: 48%

Divide 120 by 250 and you get .48, making it 48%

to determine the percent of change, divide 120/250 =0.48 then divide the answer by 100 =48%
I hope this helped

Marco wrote the equation below. Cos ( -π /2) = cos ( 3π / 2)

Which statement best describes Marcos equation?

Answers

Answer:

It is true, because the cosine function has a period of 2π

Step-by-step explanation:

Since, the period of the cos function is 360° ( or 2π radians ), it holds the property of:

$Cos(\theta)=Cos(2\pi +\theta)$

Taking $\theta$ as $-(\pi)/(2)$ , $(2\pi + \theta)$ is equal to $2\pi + (-(\pi)/(2))\n=2\pi - (\pi)/(2)\n=(4\pi-\pi)/(2)\n=(3\pi)/(2)$

The equation is true!

Note: The cos function is even function

Hence, the equation is true, because the cosine function has a period of 2π, NOT because the cosine function is ODD, which it is not!!

Terrence and Lee were selling magazines for a charity. In the first week, Terrance sold 30% more than Lee. In the second week, Terrance sold 12 magazines, but Lee did not sell any. If Terrance sold 50% more than Lee by the end of the second week, how many magazines did Lee sell?Choose any model to solve the problem. Show your work to justify your answer.

Answers

Lee sold 60 magazine

Step-by-step explanation:

Terrence and Lee were selling magazines for a charity

In the first week, Terrance sold 30% more than Lee
In the second week, Terrance sold 12 magazines, but Lee did not sell any
Terrance sold 50% more than Lee by the end of the second week

We need to find how many magazines Lee sold

Assume that Lee sold x magazines

∵ Terrance sold 30% more than Lee in the first week

∵ Lee sold x magazines in the first week

- Find 30% of x and add it to x to find how many magazines

Terrance sold

∵ Terrance sold = 30% × x + x

∴ Terrance sold = $(30)/(100)$ × x + x = 0.3 x + x

∴ Terrance sold = 1.3 x magazines in the first week

∵ Terrance sold 12 magazines in the second week

- Add 1.3 x to 12 to find the number of magazines that Terrence

sold in the two weeks

∴ Terrence sold 1.3 x + 12 magazines in the two weeks

∵ Lee did not sell any in the next week

∴ Lee sold x magazines in the two weeks

∵ Terrance sold 50% more than Lee by the end of the 2nd week

- Equate 1.3 x + 12 by the sum of x and 50% of x

∴ 1.3 x + 12 = 50% × x + x

∵ 50% × x = $(50)/(100)$ × x = 0.5 x

∴ 1.3 x + 12 = 0.5 x + x

- Add the like terms in the right hand side

∴ 1.3 x + 12 = 1.5 x

- Subtract 1.3 x from both sides

∴ 12 = 0.2 x

- Divide both sides by 0.2

∴ 60 = x

Lee sold 60 magazine

Learn more:

You can learn more about the percentage in brainly.com/question/12284722

#LearnwithBrainly

The staff of the Westport public library signed up 6 volunteers in the last 21 days. If the library staff continues to sign up volunteers at this rate, how many new volunteers will they get in the next 7-day week?

Answers

both 6 and 21 are divisive by 3 so each 7 day week the library hires 2 people.
answer is 2

You practice your basketball shots every day. On Friday you made 20 shots. On Saturday you made 16 shots. What is the percent decrease in shots you made?4%

16%

20%

80%

Answers

So,

All you have to do to find the percent decrease is to subtract your score on Saturday from your score on Friday and divide the result by your score on Friday. If you let "f" represent your score on Friday and let "s" represent your score on Saturday, you can re-write this mathematically:

$(f - s)/(f) = percent\ decrease$

Substitute.
$(20 - 16)/(20) = percent\ decrease$
$(4)/(20) \ or\ (1)/(5)\ or\ twenty\ percent = percent\ decrease$

The percent decrease in shots you made was 20%. That would be option C.

the percent decrease was 20% because 4 shots less were on sat.

put it into a fraction to find the percentage:

4/20

=20%

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