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aliina [53]
3 years ago
8

Help ASAP please!!!

Mathematics
2 answers:
Mashcka [7]3 years ago
4 0

I’m not entirely sure but maybe it’s c

kobusy [5.1K]3 years ago
4 0

Find the rate per hour for each of the four asked by diving the total by the number of hours:

Mark: 100 /10 = $10 per hour

Rick: 80 / 9 = $8.89 per hour

Steve: 75 / 8 = $9.38 per hour

Andy: 60 / 5 = $$12 per hour

Now add the four hourly rates and divde by 4:

10 + 8.89 + 9.38 + 12 = 40.27 / 4 = 10.07

Rounded to the nearest whole dollar would be $10 per hour.

The answer is A.

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If cade shoots 275 free throw baskets in 2 hours, how many can he shoot in 5 hours
Volgvan
Hey there! :D

Find the unit rate. 

275/2= 137.5 

Cade shoots 137.5 free throws per hour. Multiply that by 5 for 5 hours. 

5*137.5= 687.5 

He can shoot 687.5 free throws in one hour. You could just round that to 688.

I hope this helps!
~kaikers
6 0
3 years ago
Read 2 more answers
There are several scenarios described below. For each of them, do the following (note: R.V. means random variable) (1) Define th
frutty [35]

Answer:

a) The Ohio Bureau of Motor Vehicles states that 7 out of 8 people pass the written driver’s test.

Let X be the number of test given by the test taker to pass out.

So X~Geometric(p) where p=Probability that for a particular test anyone will pass the written test=7/8

and here support of X be equal to 1,2,3,..... i.e X is a Natural number

So ,probability that he will pass the written test in fewer than 4 tries

=P(X<4)

=\sum _{x=0}^{3}p(1-p)^{x-1}

b) LAIMO manufacturing company makes parts for the auto industry. Approximately 3% of the parts it makes are defective.

So let X=number of non defective parts sampled before the 3rd defective part is sampled

then X~Negative Binomial(r,p) where here r=3 and p=Probability that a randomly selected part is defective= 0.03

where support of X is {0,1,2,3,...}

So the probability that the third defective part is the 20th one sampled.

P(X=20-3=17)

=\binom{r+16}{17}p^r(1-p)^{16}

c) A BigMart store is going to hire 3 new cashiers. It has 18 applicants (10 male, 8 female) for these 3 cashier jobs.

So let X be number of female cashier appointed.

Here X~Hypergeometric(3,8,18) where

f(x)=P(X=x)

=\left\{\begin{matrix} \frac{\binom{8}{x}.\binom{10}{3-x}}{\binom{18}{3}} & ,x=0,1,2,3\\ 0 & ,otherwise \end{matrix}\right.

So the probability that none of the positions are filled by females

=P(X=0)

d) A gardener is inspecting the fall flowers in her garden. She notices, on average, 4 bugs on a flower. She randomly picks one flower from her garden.

Let X be the numbers of bugs on that flower

So X follows Poisson distribution with mean 4 where support of X is {0,1,2,3.....}

So the probability that the flower she picked has at least one bug on it

=P(X\geq 1)=1-P(X=0)

=1-e^{-4}\frac{4^x}{x!}|_{x=0}

e) A student is taking a true/false test that consists of 15 questions. Based on past performance the student has approximately a 70% chance of getting any individual question correct.

So let X be the number of questions that are correct among those 15 questions.

so X~Binomial(n,p) where n=15 and p=Probability that he get an individual question correct =0.7

where support of X be {0,1,2,3,...,15}

So the probability that the student gets at least 60% of the questions on the test correct or 15x60%=9 questions are correct

=P(X\geq9)

=\sum _{x=9}^{15}\binom{15}{x}p^x(1-p)^{15-x}

f) A certain radio station’s phone lines are busy approximately 95% of the time when trying to call during a contest.

Let X denotes the number of calls to get into the contest.

So X~Geometric(p) where p=Probability that in a call I get through into the contest=1-0.95=0.05

support of x={1,2,3,....}

So the probability that the 4 th time you call is the 1st time you get through during a contest.

=P(X=4)

=p(1-p)^4

4 0
2 years ago
What is the value of x in the equation 8+x=3?<br> -5<br> 5<br> 11<br> 24
nadya68 [22]
The answer is:
x = -5
4 0
2 years ago
Read 2 more answers
Marco is measuring two pieces of strings. One piece of string is 15 cm long. The other string is 250 mm long. In centimeters, ho
faltersainse [42]

Answer:

400 mm

Step-by-step explanation:

to convert cm to mm, you add a 0, or more specifically, multiply by 10. so, 15 × 10= 150. 250+150=400.

5 0
2 years ago
How to work this problem must show work. n-2
Leona [35]
I am only guessing that you mean:

(n-2)/-3<7  if so, multiply both sides by -3 (and reverse the direction of the inequality sign because of negative mulitplication!)

n-2>-21  add 2 to both sides

n>-19
3 0
3 years ago
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