The public library surveyed 220 people about their favorite type of movie. If 25% of the people chose documentaries, how many people chose documentaries?

55 people.

Step-by-step explanation:

Multiply 220 by the percentage in decimal form. To make any percentage to a decimal, simply move the decimal 2 spaces to the left. Now instead of 25, you have 0.25. Multiply this by 220 to get 55. Hope the Helps!

3 ft

step-by-step explanation:

since the triangle is right use pythagoras' identity to solve for a

the square on the hypotenuse is equal to the sum of the squares on the other two sides, that is

a² + 8² = ( )²

a² + 64 = 73 ( subtract 64 from both sides )

a² = 9 ( take the square root of both sides )

a = = 3

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)