A trade magazine routinely checks the​ drive-through service times of​ fast-food restaurants. A​ 90% confidence interval that results from examining 601 customers in one​ fast-food chain’s​ drive-through has a lower bound of 172.1 seconds and an upper bound of 175.7 seconds. What does this​ mean?

b. x + 1

step-by-step explanation:

i'am smart

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

to complete this square you have to rotate about the origin 270 degrees clockwise.