I NEED HELP ASAP PLS

Mathematics

2 answers:

Salsk061 [2.6K]3 years ago

7 0

Answer:

d) all notebooks would fall at the same time

Step-by-step explanation:

One thing you learn in Physics class is that acceleration due to gravity is the same for all objects: their change in speed as a function of time is not dependent upon their weight.

For similar objects (notebooks) falling from desk-top height, the effect of air resistance is probably negligible, and is unlikely to be measurable in a casual experiment of the sort described here.

_____

If you assume heavier objects fall faster, then answer selections b and c both would have to be correct. If you assume there is only one correct answer, it must be d.

Eva8 [605]3 years ago

6 0

Answer:

e) 2.5

Step-by-step explanation:

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PLEASE HELP A rectangular region is removed from another rectangular region to create the shaded region shown below. Find the ar

Mars2501 [29]

<h3>Answer: shaded region has area 107 square feet</h3>

================================================

Work Shown:

A = area of larger rectangle

A = length*width = 9*15 = 135 square feet

B = area of smaller rectangle

B = length*width = 7*4 = 28 square feet

C = area of shaded region

C = difference in areas of A and B

C = A - B = 135 - 28 = 107 square feet

4 0

3 years ago

Suppose that 75% of all trucks undergoing a brake inspection at a certain inspection facility pass the inspection. Consider grou

RSB [31]

Answer:

b) 0.2961

c) 0.2251

d) Mean = 11.25, Standard deviation = 1.667

Step-by-step explanation:

We are given the following information:

We treat trucks undergoing a brake inspection passin as a success.

P( trucks undergoing a brake inspection passes the test) = 75% = 0.75

a) Conditions for binomial probability distribution

There are n independent trial.
Each trial have a success probability p
The probability of success is same for all trials.

Then the number of trucks undergoing a brake inspection follows a binomial distribution, where

$P(X=x) = \binom{n}{x}.p^x.(1-p)^{n-x}$

where n is the total number of observations, x is the number of success, p is the probability of success.

Now, we are given n = 15

b) P(proportion of groups will between 8 and 10 trucks pass the inspection)

We have to evaluate:

$P(8\leq x \leq 10) = P(x = 8) + P(x = 9) + P(x = 10)\\= \binom{15}{8}(0.75)^8(1-0.75)^7 + \binom{15}{9}(0.75)^9(1-0.75)^6 + \binom{15}{10}(0.75)^{10}(1-0.75)^5\\= 0.0393 + 0.0917 + 0.1651\\= 0.2961$