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3 years ago

I need help please to figure out what this means !!

Mathematics

1 answer:

bulgar [2K]3 years ago

7 0

You multiply 1.5 to p you'll get 1.5p then you multiply 6 and 10 then divide 1.5 .... p=40

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Margie is practicing for an upcoming tennis tournament. Her first serve is good 20 out of 30 times on average. Margie wants to k

mojhsa [17]

Answer:

0.6804

Step-by-step explanation:

Given that Margie is practicing for an upcoming tennis tournament. Her first serve is good 20 out of 30 times on average.

Since each trial is independent and there are two outcomes, X no of good serves is binomial with n=6 and p =2/3

Required probability

= Prob that atleast four of 6 times good serve

= $P(X\geq 4)$

= $P(x=4,5 or 6)\\=1-F(3)\\=0.6804$

Formula used:

P(X=r) = $6Cr (\frac{2}{3}^r )(\frac{1}{3}^{6-r} )$

7 0

2 years ago

Read 2 more answers

Trees are planted at intervals of 5 m along side of a 140 m straight path. The first tree is planted at the start of the path an

Luden [163]

<h3>Solution :</h3>

Distance between first tree and last tree is 140m .

And distance between each tree (d) = 5 m

let's solve for number of trees (n) :

$\hookrightarrow \: (n - 1)d = 140$

$\hookrightarrow \: (n - 1)5 = 140$

$\hookrightarrow \: n - 1 = \dfrac{140}{5}$

$\hookrightarrow \: n = 28 + 1$

$\hookrightarrow \: n = 29$

hence, total number of trees = 29.

4 0

2 years ago

PLEASE HELP!! 25 POINTS AWARDED

kondaur [170]

Answer:

The following numbers ARE functions:

2, 3, 6, 7, 9, 12

Step-by-step explanation:

A function is only possible if the x values have NO REPEATING NUMBER!!!

Every number that isn't mentioned above has at least 1 number in it's x-values that repeats.

Question 1 has the 8 and 4 with 2 numbers.

Question 4 the 3 repeating. (There are 2 dots over the 3)

Question 5 has numbers 1 and 5 repeating many times

Question 8 numbers 1 and 2 are repeated twice

Question 10 number 3 repeats twice

Question 11 has the 1 repeated

8 0

3 years ago

Please help with part b

timofeeve [1]

Answer:

161391

Step-by-step explanation:

138000 x 16.95/100 = 23391

138000 + 23391 = 161391

5 0

2 years ago

Evaluate the limit as x goes to infinity of x^3e^-x/5

jekas [21]

Answer: 0

Step-by-step explanation:

$\frac{x^{3}e^{-x}}{5}$

This could be written as

$\frac{x^{3} }{5e^{-x} }$

Applying L'H rule and differentiating 3 times , we have

$\frac{6}{5e^{x} }$

taking the limit as x goes to infinity , we have

5 0

3 years ago