The central intelligence agency (cia) has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted messages. in standard english text, the letter i is used at a rate of 7.54%. find the mean and standard deviation for the number of times the letter i will be found on atypical page of 2400 characters. (round answer to one decimal place.) ? = 180.96 correct (round answer to two decimal places.) ? = 12.94 correct give the interval of usual values for the number of i's appearing on a page of 2400 characters. (enter answer as an interval using square-brackets only with whole numbers.) usual values = [181] incorrect

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation:

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)

step-by-step explanation:

365

step-by-step explanation: