Erik rode down an escalator, while raj rode up. erik's elevation is represented by the equation h = 12 – 0.75t, and raj's elevation is represented by h = 0.75t. what does the point of intersection on the graph represent? erik and raj were at the same elevation after both of them had been riding the escalator for 6 seconds. erik and raj were at the same elevation after both of them had been riding the escalator for 8 seconds. erik and raj were at the same elevation after erik had been riding the escalator for 6 seconds and raj had been on the escalator for 8 seconds. erik and raj were at the same elevation after erik had been riding the escalator for 8 seconds and raj had been on the escalator for 6 seconds.

Erik and Raj were at the same elevation after both of them had been riding the escalator for 6 seconds.

Step-by-step explanation:

x = central angle apc = measure of minor arc ac

the two angles x and 30 add to 180, so x+30 = 180 and x = 180-30 = 150. the measure of minor arc ac is 150 degrees.

what we need to do from here is find the circumference and then multiply it by x/360 since there are 360 degrees in a circle. in this case, x = 150, so x/360 = 150/360 = 15/36 = 5/12. the shortest distance along the curve from a to c is 5/12 of the distance around the entire circle (aka circumference)

c = circumference

c = pi*d

c = pi*24

c = 24pi

now multiply this by 5/12 to get

distance along minor arc ac = (5/12)*(circumference)

distance along minor arc ac = (5/12)*(24pi)

distance along minor arc ac = 10pi

the formula you can use is

l = (x/360)*pi*d

with

l = length of minor arc

x = central angle

d = diameter

which essentially is the steps we took though a bit differently.

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google