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3 years ago

Hii please help i’ll give brainliest

Mathematics

2 answers:

natulia [17]3 years ago

5 0

Answer:

Oh THIS IS B TRUST I HAD DONE THIS BEFOR

I REALLY NEED BRAINLIST CAN U GIVE ME BRAINLIST PLZZZZZZZZZZZZz

Step-by-step explanation:

Luba_88 [7]3 years ago

4 0

It’s D because 37 is the median

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Trains headed for destination A arrive at the train station at 15-minute intervals tarting at 7am, where as trains headed for de

grandymaker [24]

Answer: a.) 2/3 ; b.) 7/12

Step-by-step explanation:

Given the following details :

Destination A trains arrives at station at 15 minutes interval starting from 7am

Destination B trains arrives at station at 15 minutes interval starting from 7.05am

A.) if a passenger arrives at station uniformly between 7am and 8am and gets on first train. What proportion of time does the passenger leave from destination A?

To leave for destination A. The passenger has to arrive before train to A departs and after train to B leaves.

Train to B leaves, starting at at 7.05 a.m and at interval of 15 minutes

Train to A leaves at 7.00 am and at interval of 15 minutes.

Therefore,

(Train B departs - train A arrives) (between 7 to 8am)

(7.05 - 7.15) + (7.20 - 7.30) + (7.35 - 7.45) + (7.50 - 8.00) = 40 minutes

Total time = 7.00 - 8.00 = 60 minutes

(40 ÷ 60) = 2/3 or 0.667

B.) If passenger arrives uniformly between 7.10am - 8:10am

(7.10 - 7.15) + (7.20 - 7.30) + (7.35 - 7.45) + (7.50 - 8)

5 + 10 + 10 + 10 = 35

35/60 = 7/12 or 0.583

8 0

3 years ago

Timber beams are widely used in home construction. When the load (measured in pounds) per unit length has a constant value ove

Delicious77 [7]

Answer:

a) 0.4

b) 0.133

c) $L \geq 99$

Step-by-step explanation:

We are given the following information in the question:

The load is said to be uniformly distributed over that part of the beam between 90 and 105 pounds per linear foot.

a = 90 and b = 105

Thus, the probability distribution function is given by

$f(x) = \displaystyle\frac{1}{b-a} = \frac{1}{105-90} = \frac{1}{15},\\\\90 \leq x \leq 105$

a) P( beam load exceeds 99 pounds per linear foot)

P( x > 99)

$=\displaystyle\int_{99}^{105} f(x) dx\\\\=\displaystyle\int_{99}^{105} \frac{1}{15} dx\\\\=\frac{1}{15}[x]_{99}^{105} = \frac{1}{15}(105-99) = 0.4$

b) P( beam load less than 92 pounds per linear foot)

P( x < 92)

$=\displaystyle\int_{90}^{92} f(x) dx\\\\=\displaystyle\int_{90}^{92} \frac{1}{15} dx\\\\=\frac{1}{15}[x]_{90}^{92} = \frac{1}{15}(92-90) = 0.133$

c) We have to find L such that

$\displaystyle\int_{L}^{105} f(x) dx\\\\=\displaystyle\int_{L}^{105} \frac{1}{15} dx\\\\=\frac{1}{15}[x]_{L}^{105} = \frac{1}{15}(105-L) = 0.4\\\\\Rightarrow L = 99$

The beam load should be greater than or equal to 99 such that the probability that the beam load exceeds L is 0.4.

4 0

4 years ago

20 POINTS FOR STEP BY STEP!!

kobusy [5.1K]

BAD=BCD(base angle ,isosceles triangle)
ABD=CBD(given)
BAD+BCD+ABC=180(angle sum of triangle)
36+36+ABC=180
ABC=108
ABC=ABD+CBD
CBD=108/2
=54
therefore
x=54

8 0

3 years ago

Read 2 more answers

Paul's car is 16 feet long. He is making a model of his car that is the actual size. What is the length of the model?

Alexandra [31]

Answer:

16 feet

The length and the feet long are the same thing in this situation.

6 0

3 years ago

Read 2 more answers

Please help ! I’ll give brainliest

Hunter-Best [27]

Answer:

the answer is a) 100*

the angles it is bigger than is an acute angle (below 90)* and a right angle (exactly 90*) so the answer is anything above 90* and so it has to be 100*

5 0

3 years ago