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antiseptic1488 [7]
3 years ago
13

Please help with this

Mathematics
1 answer:
Elza [17]3 years ago
8 0

area \: of \: circle \: a1 = \pi {r}^{2}  = \pi \times {21}^{2}  = \\  441\pi sq \: \:  .in \\ area \: of \: triangle \: a2 =  \frac{1}{2} bh =  \frac{1}{2}  \times 20 \times 39  \\ = 390 \: sq.in \\ now \: area \: of \: shaded \: region = a1 - a2 \\  = 441\pi - 390 \\  = 995.44 \: sq.in

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The elevation of city A is 72 feet above sea level; the elevation of City C is 24 feet above sea level. The elevation of city D
emmasim [6.3K]

Answer:

<h2> D=C/4</h2>

Step-by-step explanation:

Given that elevation of the cities are

A=72 feet

C=24 feet

D=1/4 of C

The expression for the elevation of city D is

D=C/4

substituting C=24 in the expression we have

D=24/4

D=6

The answer is positive because the elevation is above sea level

7 0
4 years ago
It says to calculate the area of the sector and t round to the nearest hundredth and to use 3.14 for Pi
fenix001 [56]

Answer:

Step-by-step explanation:

The formula for the area of a sector is

A=\frac{\theta}{360}*\pi r^2 where theta is the measure of the central angle (which is the same measure as that of the arc that is intercepted by the 2 radii formig the angle), and r is the radius.

For us, theta is 90 degrees and r is 20. Filling in the formula:

A=\frac{90}{360}*(3.14)(20)^2 which simplifies down a bit to

A=\frac{1256}{4} so

A = 314 m squared

5 0
4 years ago
A company borrows $70,500 for 3 years at a simple interest of 6.5% to buy trucks. Find the total amount paid on the loan
baherus [9]

Answer:

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4 0
4 years ago
The number of years from the start of the Great Depression to the first presidential election of Richard Nixon is six years less
svp [43]

Answer:

Raul's age is 15 years.

Step-by-step explanation:

r represents Raul's age.

The number of years from the start of the Great Depression to the first presidential election of Richard Nixon is six years less than three times Raul's age.

The first presidential election happened 39 years after the Great Depression and six years less than three times Raul's age is 3r - 6.

Therefore, 3r - 6 = 39

Add 6 to both sides.

3r = 45

Divide both sides by 3.

r = 15

Hence, Raul's age is 15 years.


7 0
4 years ago
Read 2 more answers
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ZanzabumX [31]
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7 0
3 years ago
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