Answer:
Step-by-step explanation:
When a ceiling fan is turned on it sweeps out a circle. That means that this question is asking us to find the area of the circle with a radius of 25 inches.
is the area of a circle. If the radius is 25 inches and pi is 3.14, then
and
A = 3.14(625) so
A = 1962.5 inches square.
In terms of pi, the area is
A = 625π
Answer:
Speed of river's current = 5 mph
Step-by-step explanation:
Let 'd' be the distance covered
Let x be the speed of the rivers current
Speed upstream = 15-x
speed downstream = 15+x
Time = distance / speed
time upstream =
time downstream =
the ferry trip upstream takes twice as long as its return trip downstream
=
divide both sides by d
=
cross multiply
Add 2x on both sideds
subtract 15 from both sides and divide by 3
x=5
Speed of river's current = 5 mph
Answer:
a₁ = 10
Step-by-step explanation:
The common difference d is calculated as
d = a₃ - a₂ = - 20 - (- 5) = - 20 + 5 = - 15
Then
a₂ - a₁ = d , that is
- 5 - a₁ = - 15 ( add 5 to both sides )
- a₁ = - 10 ( multiply both sides by - 1 )
a₁ = 10
7x8=56 (area of the rectangle of the “house” shape)
11-8=3
7x3=21x1/2 (how to find area of the triangle)
10.5
So the answer is 10.5 cm2 (centimeters squared)
Answer:
x is greater than or equal to 6