Answer:
The length of the semicircle arc is 6π
Step-by-step explanation:
To solve this problem we need to use the circumferenc formula of a circle:
c = circumference
r = radius = 12
π = pi
c = π * d
we replace with the known values
c = π * 12
c = 12π
The length of the circumference is 12π
N
ow we divide the circumference by 2 and we will obtain the length of the arc of the semicircle
12π / 2 = 6π
The length of the semicircle arc is 6π
Answer:
The triangle should be 16 inches wide.
Step-by-step explanation:
What we know:
- One of the legs measures 12 inches.
- The hypotenuse is 20 inches.
We need to solve for b. Solving for a while b is 12 would also be acceptable.
We will use the first equation.
The triangle should be 16 inches wide.
1. 30% decrease
2. 33 1/3% increase
Step by step explanation:
Question 1.
$50 to $35 is a decrease, because 35 is smaller than 50.
(50-35)/50 * 100%
= 15/50 * 100%
= 30%
Ans: 30% decrease
Question 2.
150 days to 200 days is an increase because 200 is large than 150.
(200-150)/150 * 100%
= 50/150 * 100%
= 1/3 * 100%
= 33 1/3% or 100/3%
Ans: 33 1/3% increase
Answer:
The change in height is 6/10 miles per hour and the entire descent will last 150 minutes (2 hours and 30 minutes)
Step-by-step explanation:
The gilder started 1 1/2 miles above the ground, in other words, it started miles above the ground. After 60 minutes it is now miles above the ground.
Therefore, the change in height in one hour is: miles.
Now, we know that the glide descends at a rate of 6/10 miles per hour, we can solve the second part of the problem using the rule of three (or proportions)
<em>If it takes it 60 minutes to descend 6/10 miles, how long it will take it to descend 15/10 miles?</em>
60 minutes --- 6/10= .6
x minutes ---- 15/10= 1.5
Therefore minutes
Thus, the entire descent will last 150 minutes.