Help please!! 1) A rollercoaster starts by
ascending 20 feet for every 30 feet it
moves forward. The coaster starts at a
point 18 feet above the ground. Write the
equation of the line that the roller coaster
travels along in point-slope form, and use
it to determine the height of the coaster
after traveling 150 forward. Assume that
the roller coaster travels in a straight line
for the first 150 feet. SHOW ALL WORK

2)Suppose that laser eye surgery is
modeled on a coordinate grid. The laser is
positioned at the y-intercept so that the
light shifts down Imm for each 40 mm it
shifts to the right. The light reaches the
center of the cornca of the eye at (125,0).
Write the equation of the light beam in
point-slope form, and find the height of
the laser, SHOW ALL WORK

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies

inverse property is the answer

step-by-step explanation:

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west