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storchak [24]
3 years ago
13

Find the exact area of the circle with the given radius. r = 4.5 m

Mathematics
1 answer:
Alexus [3.1K]3 years ago
4 0
The area of a circle is Pi * R^2 (or R * R).
Since we have our radius, R, we can solve.
With our given answer choices, we do not need to multiply R by Pi, instead we will square R, as that's our only option.
4.5 x 4.5 = 20.25.
Our area is now 20.25Pi.
Your answer is C.) 20.25Pi.
I hope this helps!
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PLEASE HELP!!! What is the length of the diagonal of the square??
Leya [2.2K]
Since it is a right triangle, we can apply the Pythagorean theorem.

The square of the hypotenuse is equal to the sum of the squares of the sides.

We'll call H the hypotenuse and L to the side.

H² = L² + L² = 2L²

H² = 2x11²

H = \sqrt{2x11^{2}}= 11\sqrt{2}

ANSWER = F) = Diagonal= 11\sqrt{2}

\textbf{Spymore}

6 0
3 years ago
Lara wants to buy a crystal sculpture. The original price is $50. What is the sale price?
julia-pushkina [17]

Answer:

50*0.1=5

Step-by-step explanation:

So 90% off of 50 looks like 50-90%. 50-90%=50*1-0.9*50 since 90% is 9/10 and we are doing 90 percent off of 50. 50*1-0.9*50=50*0.1=5. So $5.

6 0
3 years ago
Officials project that between 2010 and 2050, the population of a certain city will drastically change. The model below gives th
MaRussiya [10]

Answer:

In the year 2010, the population of the city was 175,000

Step-by-step explanation:

If we rewrote this as a linear expression in standard form (it is linear, btw), it would look like this:

P(t)=\frac{11}{2}t+175

The rate of change, the slope of this line, is 11/2.  If the year 2010 is our time zero (in other words, we start the clock at that year), then 0 time has gone by in the year 2010.  In the year 2011, t = 1 (one year goes by from 2010 to 2011); in the year 2012, t = 2 (two years have gone by from 2010 to 2012), etc.  If we plug in a 0 for t we get that y = 175,000.  That is our y-intercept, which also serves to give us the starting amount of something time-related when NO time has gone by.

3 0
3 years ago
The 2th term of The A.P is 7 and 9th term is 28, Find The comon difference and The first term.
Radda [10]

Answer:

difference = 3, first term = 4

Step-by-step explanation:

given, a2 = 7

a9 = 28

wkt, a2 = a + d = 7

<u>a9 = a + 8d</u><u> </u><u>=</u><u> </u><u>28</u>

- 7d = - 21

therefore d = 3

and wkt, d = a2 - a

a = 7 - 3 = 4

HOPE THIS HELPS

8 0
3 years ago
Maggie leaves her home and travels 4 miles
DiKsa [7]

Answer:11 miles

Step-by-step explanation:

4 0
3 years ago
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