Hello.
The area of a square is calculated by the formula:
A = l²
As A = 75 ft², we have:
75 = l²
l = √75
Now, note that: 75 = 3 . 25 = 3 . 5²
So:
l = √(3 . 5²) = √3 . √(5²)
<u>l = 5√3 ft</u>
Now, we can assume √3 = 1.73
l ≈ 5 * 1.732
l ≈ 8,7 ft (Note that I have already put it in the nearest tenth)
OK :)
Answer:
357 mi²
Step-by-step explanation:
A = LW + 0.5πr²
A = (10 × 20 + 0.5 × 3.14159 × 10²) mi²
A = (10 × 20 + 0.5 × 3.14159 × 10²) mi²
A = 357 mi²
Answer:
126
Step-by-step explanation:
To calculate this, we need to assume at least one white marble will be picked... so let's take it out of the bag. Then we need to pick 4 more marbles... it's just then a combination calculation.
How many marbles is there in total? 4 + 3 + 2 + 1 = 10
We do just as if we had removed one white marble from the bag... so that leaves 9 in the bag.
We have to pick 4 out of those 9.... so, it's simple combination calculation:
C(9,4) = 9! / (4! (9--4)!) = 9! / (4! 5!) = 126
Some of those grabs will have 2 white marbles... but we're assured that there are 126 ways to combine the 10 marbles so there's at least one white in the 5 picked (since we forced it in our calculations).
Let there are total x fishes.
so 5%of x is 15
so 5×x/100=15
x=15×100/3
x=300
So there are total 300 fishes
Answer:
3/2
Step-by-step explanation:
