(b) Suppose two telephone poles are 40 ft apart and the length of the wire between the poles is 41 ft. If the lowest point of the wire must be 23 ft above the ground, how high up on each pole should the wire be attached? (Round your answer to two decimal places.)

d is correct

step-by-step explanation:

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."

answer is

b.

11

hope you get this one right.