All categories

3 years ago

Find the sum of the sequence 31+32+33+34...+94

Mathematics

1 answer:

Nana76 [90]3 years ago

6 0

Answer:

4000

Step-by-step explanation:

You might be interested in

Solve the equation, round number the the nearest hundredth if needed.

Elza [17]

12+6/7n=-25n add 25n and subtract 12 on both sides

25 6/7n=-12 convert to improper fraction

181/7n=-12 multiply both sides by seven to clear the fraction

181n=-84 divide both sides by 181 to get your answer

n= -.46 hope that helps..

4 0

3 years ago

Find the median of 11, 99, 62, 30, 41

gladu [14]

Answer:

Step-by-step explanation:

once you put the numbers in numerical order, 11 30 41 62 99, the median (middle number) is 41

3 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:

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

c) P( exactly 3 trucks fail the inspection)

p = 0.25

$P(x = 3)\\= \binom{15}{3}(0.25)^3(1-0.25)^{12}\\=0.2251$

d) Mean and standard deviation

$\mu = np = 15(0.75) = 11.25\\\sigma = \sqrt{np(1-p)} = \sqrt{15(0.75)(1-0.75)} = 1.667$

6 0

3 years ago

kayla bought h number of hats for $13.25 each.if she has $50 dollars to spend ,how many hats could she have bought?

shutvik [7]

4 is the answer to your question

7 0

3 years ago

Select the functions that have identical graphs.

Elan Coil [88]

Answer:

c. 1 and 3

Step-by-step explanation:

To quickly solve this problem, we can use a graphing tool or a calculator to plot each equation.

Please see the attached image below, to find more information about the graph

The equations are:

1) y = sin (3x + π/6)

2) y = cos (3x - π/6)

3) y = cos (3x - π/3)

Looking at the graphs, we can see that the identical ones

are equations one and three

Correct option:

c. 1 and 3

3 0

4 years ago