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erastovalidia [21]
3 years ago
12

A radio station has a broadcast area in the shape of a circle with equation x2+ y2=5,625, where the constant represents square m

iles.
-Graph the equation and state the radius in miles.
-What is the area of the region in which the broadcast from the station can be picked up?

Mathematics
1 answer:
scZoUnD [109]3 years ago
6 0

Answer:

r = 75 mi; A = 17 671 mi²

Step-by-step explanation:

(a) Graph

The equation for a circle is

x² + y² = r²

Your equation is

x² + y² = 5625 = 75²

The graph is a circle with a radius of 75 mi.

(b) Broadcast area

A = πr² = π × 75² = π × 5625 ≈ 17 671 mi²

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3 years ago
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Andrea has a savings account with $80 that earns 2% interest per
lianna [129]

Answer:

After 10 years, she will has $96 in her bank.

Step-by-step explanation:

It is given that Andrea's saving account is $80 and earns 2% interest per year as a <em>S</em><em>i</em><em>m</em><em>p</em><em>l</em><em>e</em><em> </em><em>I</em><em>n</em><em>t</em><em>e</em><em>r</em><em>e</em><em>s</em><em>t</em><em> </em>(Not Compounded). Using simple interest formula, Interest = (P×R×T)/100 where <em>P</em> is the <em>principal</em>, <em>R</em> is the <em>interest rate</em> and <em>T</em> is <em>number of years</em><em> </em>:

I =  \frac{p \times r \times t}{100}

P = $80

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8 0
3 years ago
Length 21cm area 315cm2 find the breath ​
Ronch [10]

Answer:

Breadth = 15 cm

Step-by-step explanation:

Area = length x breadth

315 = 21 x breadth

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4 0
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yanalaym [24]

Answer:

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Make the equation.

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Now isolate x (in order to solve for it)

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