Answer:
Step-by-step explanation:
Hello! The sum of the two quotients are 5x+8x=13x
Hope this helps. Any questions please ask. Thank u kindly.
Answer:
S = 2πr² + 2πrh = 2πr(r + h)
Step-by-step explanation:
The formula for the surface area of a cylinder is the sum of the area of the base and the lateral faces.
Mathematically,
surface area = base area + lateral area
A cylinder has 2 base which are circular therefore, the sum of the area of the base is πr² + πr² = 2πr².
The lateral area is the curved surface area of the cylinder which is the multiplication of the height and the circumference .
curved surface area = h × circumference = 2πrh
surface area = 2πr² + 2πrh = 2πr(r + h)
S = 2πr² + 2πrh = 2πr(r + h)
The surface area can be calculated if you know the height of the cylinder and the radius. example r = 5 m and h = 10 m
Using the formula
S = 2πr² + 2πrh = 2πr(r + h)
S= 2 × π × 5(5 + 10)
S = 10π(15)
S = 150π m²
Answer:
5.73 hours
Step-by-step explanation:
70% decay means 30% remains
.3 = (1/2)^(t/3.3)
take the log of both sides
log.3 = t/3.3 * log1/2
Divide both sides by log 1/2
log.3 / log1/2 = t/3.3
use calculator
1.736965594166206 = t/3.3
multiply both sides by 3.3
5.73198646074848 = t
rounded
t = 5.73 hours
