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4 years ago

15

At a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle (blue) with a radius of

11 m. The inner edge of the sidewalk is a circle (orange) with a radius of 9 m. Find the approximate AREA of the smaller circle (orange).
Use 3.14 for pi.

1 answer:

soldier1979 [14.2K]4 years ago

5 0

Answer:

380

Step-by-step explanation:

11^2 x 3.14 = 380

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In a particular country, the coins come in the denominations 1, 15 and 50 schillings. Whilst visiting this country, Peter bought

ELEN [110]

Answer:

Step-by-step explanation:

Depending on the tools available to your 11y.o., it's a typical question for linear inequalities.

Where a,b,c are the # of 1,15,50 coins given by the buyer, and d,e,f the # of coins given back by the seller.

1×a + 15×b + 50×c > 1×d + 15×e + 50×f

a+b+c+1>=d+e+f

a+b+c >=2

Now, there are other clues in the text :

If the seller gives back money, then you didn't pay with 1's, otherwise, it means you overpay and you could have given fewer coins. So a=0.

Similarly, the seller cannot give you back a coin of 50, otherwise, you could have given fewer coins as the buyer. So f=0.

So that gives :

15×b + 50×c > 1×d + 15×e

b+c+1>=d+e

b+c >=2

From that point on, there is only a handful of scenarios to test.

5 0

2 years ago

From least to greatest???

DiKsa [7]

The aswer is a and i use a calculator

hope i helped

6 0

3 years ago

Kabul’s bookshop marks up all books by 40 percent of their cost. The overhead rate is 16 percent of the selling price. What is t

morpeh [17]

Answer:

The net profit rate on the book is 5.41

Step-by-step explanation:

Given as :

The marks up percentage of book = m = 40%

The overhead rate is 16% of selling price

The cost price of book = c.p = $18.10

Let The profit = $p

Let The selling price = s.p

<u>Now, According to question</u>

mark up percentage = $\dfrac{s.p - c.p}{c.p}$

I.e 40% = $\dfrac{s.p - 18.10}{18.10}$

Or, $\dfrac{40}{100}$ + 1 = $\dfrac{s.p}{18.10}$

Or, $\dfrac{140}{100}$ = $\dfrac{s.p}{18.10}$

Or, s. p = $\dfrac{140\times 18.10}{100}$

∴ s.p = $25.34

So, selling price of book = s.p = $25.34

Now, The overhead percentage = 16%

i.e overhead rate = $\dfrac{\textrm estimated cost}{\textrm estimated total base unit}$

Or, estimated cost = 16% × 25.34

I,e estimated cost = 0.16 × 25.34

∴ estimated cost = $4.05

Now,

Profit = selling price of book - estimated book cost

I.e p = $25.34 - $4.05

∴ p = $21.29

So, The profit rate% = $\dfrac{\textrm profit}{\textrm estimated cost}$

I.e The profit rate% = $\dfrac{21.29}{4.05}$

∴ profit rate %= 5.41

So, The profit rate = p = 5.41

Hence, The net profit rate on the book is 5.41 Answer

4 0

3 years ago

3 people invest in a business in the ratio 2:3:5.if the profit from the business is $450 000.how much does each person get?

r-ruslan [8.4K]

Each person gets 45,000

6 0

3 years ago

Read 2 more answers

The total of two numbers is 28. Four times the smaller number is 7 more than three times the larger number.

navik [9.2K]

Let's define:
$x \ \textless \ y$

So, you can set up a system of equations:
$x + y = 28$
$4x = 7 + 3y$

Now, to solve for both of those values, solve the system of equations:
$x = 28 - y$
$4(28-y) = 7+3y$
$122-4y=7+3y$
$115 -4y = 3y$
$115 = 7y$
$y = 16.43$

Now, plug that y-value into the first equation to solve for x:
$x + 16.43=28$
$x = 11.57$

Now, we have both the values. The smaller value (x) = 11.57 and the bigger value (y) = 16.43.

3 0

3 years ago