The surface area of the cylindrical ring is given by
πdh
where d is the diameter and h is the height:
π•6.3•48 = 950.02
The answer is C. 950.02 in^2
total time, t = 4hours
1st speed, a = 6 mph
2nd speed, b = 15mph
total distance covered, d = 30miles
time spent at 6mph, x
time at 15mph, y
total time, t = x + y
=》4 = x +y...eqn 1
total dist, d = ax + by
=》30 = 6x + 15y...eqn 2
subst for y (= 4 -x) in eqn 2
30 = 6x + 15(4-x)
= 》 9x = 30
x = 3 1/3 = 3 hrs 20mins
y = 4 - 3 1/3 = 2/3 = 40mins
Answer:
y = -4x + 9
Step-by-step explanation:
using any two points, in this case (0, 5) and (3, -7) you can find slope by using this formula:
plug in the x- and y- values of the two points above
y = -4x + b
use any point of the line and plug it into the equation above
5 = -4(0) + b
5 = -4 + b
5 + 4 = -4 + b +4
9 = b
the equation in full is y = -4x +9
Place one corner of the square at the origin (0,0).