A certain standardized test's math scores have a bell-shaped distribution with a mean of 530 and a standard deviation of 105. Complete parts (a) through (c). (a) What percentage of standardized test scores is between 215 and 845?

nothing% (Round to the nearest tenth as needed.)

(b) What percentage of standardized test scores is less than 215?

nothing% (Round to the nearest tenth as needed.)

(c) What percentage of standardized test scores is greater than 740?

nothing% (Round to the nearest tenth as needed.)

60 for the first and 130 for the second

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)