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Bezzdna [24]
2 years ago
15

Jericho is doing a quick survey for his high school newspaper. He hands out a simple index card to 100 seniors in his high schoo

l and asks them to simply drop it in a box left near the gymnasium. The card has no place for a name or identifying information. It simply says "In the past year, have you been drunk even one time?" The student simply has to check "yes" or "no." If Jericho’s classmates are like most U.S. seniors, about ____ of them will check "yes." Quizlet
Mathematics
1 answer:
Kazeer [188]2 years ago
8 0

Answer:

50

Step-by-step explanation:

From research among high school students in the US, it was discovered in 2017 by US Centre for Disease Control and Prevention Agency(USCDC), that around 57.8% of high school students have drank alcohol in the previous 1 year.

Now, applying it to this question, since the survey is done among 100 seniors, the most modest probability would likely be 50% which represents 50 people out of the 100 surveyed that will likely check yes

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9. Rick borrowed $50 from his sister for 3 months (1/4 year). She charged him 14% interest. How much interest will Rick have to
True [87]
-4x-6y+16. Thats the answer
5 0
2 years ago
26. The cost of a television set has increased continuously by 2%. In 1999, the average
RUDIKE [14]

Answer:

<u>The exponential model is: Cost after n years = 400 * (1 + 0.02)ⁿ</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Cost of the TV set in 1999 = US$ 400

Annual increase rate = 2% = 0.02

2. Write an exponential model to represent this data.

Cost after n years = Cost in 1999 * (1 + r)ⁿ

where r = 0.02 and n = the number of years since 1999

Replacing with the real values for 2020, we have:

Cost after 21 years = 400 * (1 + 0.02)²¹

Cost after 21 years = 400 * 1.5157

Cost after 21 years = $ 606.28

The TV set costs $ 606.28 in 2020.

<u>The exponential model is: Cost after n years = 400 * (1 + 0.02)ⁿ</u>

8 0
3 years ago
A construction crew wants to hoist a heavy beam so that it is standing up straight. ey tie a rope to the beam, secure the base,
Aliun [14]
Interesting problem ...

The key is to realize that the wires have some distance to the ground, that does not change.

The pole does change. But the vertical height of the pole plus the distance from the pole to the wires is the distance ground to the wires all the time. In other words, for any angle one has:

D = L * sin(alpha) + d, where D is the distance wires-ground, L is the length of the pole, alpha is the angle, and 'd' is the distance from the top of the (inclined) pole to the wires:

L*sin(40) + 8 = L*sin(60) + 2, so one can get the length of the pole:

L = (8-2)/(sin(60) - sin(40)) = 6/0.2232 = 26.88 ft (be careful to have the calculator in degrees not rad)

So the pole is 26.88 ft long!

If the wires are higher than 26.88 ft, no problem. if they are below, the concerns are justified and it won't pass!

Your statement does not mention the distance between the wires and the ground. Do you have it?
4 0
3 years ago
Read 2 more answers
Need help please stressing out over this problem!?!?!
ludmilkaskok [199]

v =  \frac{4}{3} \times \pi \times  {r}^{3}

Finding the radius,

d = 2r, \: r =  \frac{d}{2}  =  \frac{8}{2}  = 4inches

Plugging in our values,

v =  \frac{4}{3}  \times 3.14 \times  {4}^{3}  =  \frac{4}{3}  \times 3.14 \times 64 = 267.95 {inches}^{3}  \\

Rounding to the nearest whol number,

v = 268 {inches}^{3}

6 0
3 years ago
If 4x^2 - 100 = 0, the roots of the equation are
ololo11 [35]
4x^2-100=0 \ \ \ \ \ \ |+100 \\&#10;4x^2=100 \ \ \ \ \ \ \ \ \ \ \  |\div 4 \\&#10;x^2=25 \\&#10;x=\pm \sqrt{25} \\&#10;x=\pm 5 \\&#10;x=-5 \hbox{ or } x=5

The answer is (3) -5 and 5.
5 0
3 years ago
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