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notka56 [123]
2 years ago
7

I dont understand???????????

Mathematics
1 answer:
love history [14]2 years ago
5 0

Answer:

Step-by-step explanation:

We can obtain that the dimensions of the rectangle are 7 by 5.

Since A = lw, the total area is 35.

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b) The university gym opens at 9 am on Saturday mornings. One Saturday morning at 8:55 am there are 15 students outside the gym
max2010maxim [7]

Answer:

The complete question is:

At a university, 13% of students smoke.

a) Calculate the expected number of smokers in a random sample of 100 students from this university:

b) The university gym opens at 9 am on Saturday mornings. One Saturday morning at 8:55 am there are 27 students outside the gym waiting for it to open. Should you use the same approach from part (a) to calculate the expected number of smokers among these 27 students?

Part a is easy, because is a random sample, we can expect that just 13% of these 100 students to be smokers, and 13% of 100 is 13, so we can expect 13 of those 100 students to be smokers.

b) This time we do not have a random sample, our sample is a sample of 15 students who go to the gym in the early morning, so our sample is biased. (And we do not know if this bias is related to smoking or not, and how that relationship is), so we can't use the same approach that we used in the previous part.

3 0
3 years ago
What is the vertex of f(x) = 3(x+2)^2 -1
inna [77]

Answer:

The~vertex~of~parabola~f(x) = a(x-h)^2+k~is~(h,k).\\Given~equation~of~parabola~is:\\f(x) = 3(x+2)^2-1\\So,~ h =-2 ~and~k=-1\\Therefore,~(-2,-1)~is~the~vertex~of~parabola.

7 0
3 years ago
Pls help im so bad at math
Kamila [148]

Angle E and D are supplementary and need to equal 170 when added together.

Angle D = 180-35 = 145

Angle D is split into two with part of it being 44

The missing angle is 145-44 = 101 degrees

The answer is 101

5 0
3 years ago
_1.Straighthedge<br>_2.line segment<br>_3.parallel line<br>_4.angle<br>_5.angle bisector​
AlexFokin [52]

Answer:):Step-by-step explanation:

sagutan ko sana kaso mahirap

7 0
3 years ago
I need help. PLEASEEEEEEEE
jekas [21]
Hi I got the answer I will send you soon
5 0
3 years ago
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