The area of circle can be found using the formula πr² and since we know that semi circle is half the circle so its formula will be 1/2πr².
First we will find the radius.
20/2 = 10
Radius is 10.
A = 1/2(3.14)(10)²
A = 157
Hope this helps :)
Answer:
12
Step-by-step explanation:
12+12=12 and 12 = 12 and 9+10= 21
Let the weights of the cherries held by Kristin and Doris be k and d, respectively. Kristin holds 4.2 kg fewer cherries than Doris: k = d - 4.2.
After Kristin sells 0.85 kg of cherries, k - 0.85 represents her holdings. Doris' holdings are twice Kristin's, or d = 2(k-0.85).
Find Doris' holdings. Eliminate the variable k:
Substitute d - 4.2 for k in d = 2(k-0.85): d = 2( [d - 4.2] - 0.85).
Perform the indicated multiplication now: d = 2d - 8.4 - 1.7.
Grouping like terms: 10.1 = d. Doris holds 10.1 kg of cherries.
Answer:
It will take 40 minutes for me to make the 360 wraps that I need.
9x ≥ 360 ⇒ x ≥ 40
Step-by-step explanation:
I have to make at least 360 wraps for a party.
I can make 9 wraps per minute.
So, it will take minutes for me to make the 360 wraps that I need.
If I work for x minutes to make wraps, then I will be able to make 9x wraps.
So, the inequality that models the given condition is
9x ≥ 360
⇒ x ≥ 40 {Dividing both sides by 9}
Therefore, I need to work at least 40 minutes to reach my goal. (Answer)
Step-by-step explanation:
