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dangina [55]
3 years ago
11

Help me plz because i don't know how to do it!!!

Mathematics
1 answer:
Kitty [74]3 years ago
5 0

Answer:

the play area is a circle with radius = 12

Step-by-step explanation:

Circle area = A= π r²

r = radius

A = 144 π = 452.39

Diameter = 2r

= 24

circumference = C = 2π r

= 24 π = 75.4

Q2)

Area = π r²

r = 15

r²= 225

area = 706.5

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Cos5xcosx-sin5xsinx=??????????????????
SVEN [57.7K]

Answer:

cos6x.

Step-by-step explanation:

We use the identity

cosAcosB - sinAsinB = cos(A+B)

so cos5xcosx - sin5xsinx = cos(5x + x)

= cos6x.

7 0
3 years ago
Consider the function represented by the equation x – y = 3. What is the equation written in function notation, with x as the in
pishuonlain [190]

Answer:

(x) = x – 3

Step-by-step explanation:

i had to guess but it shows the answers at the end no need to say thx but it will be nice if you do

4 0
3 years ago
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Which are solutions of the equation (x + 5)(x – 3) = 0? Check all that apply
meriva
-3+5x(-3)-3=0. So -3 is the answer
6 0
3 years ago
What is the value of x if 5^ x+2 =5^ 9 ? O x = - 11 O x = - 7 x = 7 x = 11 O O
Ratling [72]

Answer:

Step-by-step explanation:

5ˣ⁺² = 5⁹

log₅(5ˣ⁺²) = log₅(5⁹)

x+2 = 9

x = 7

8 0
3 years ago
A particle moves along a line with acceleration a (t) = -1/(t+2)2 ft/sec2. Find the distance traveled by the particle during the
amm1812

Answer:

s(t)=(ln|7|+ln|2|)\,ft

Step-by-step explanation:

Acceleration is second derivative of distance and are related as:

a(t)=\frac{d^2s}{dt^2}\\\\\frac{d^2s}{dt^2}=\frac{-1}{(t+2)^2}\\

Integrating both sides w.r.to t

v(t)=\frac{ds}{dt}=\frac{1}{t+2} +C\\

Using initial value

v(0)=\frac{1}{2}\\\\\frac{1}{2}=\frac{1}{0+2} +C\\\\C=0\\\\\frac{ds}{dt}=\frac{1}{t+2}

We have to calculate the distance covered in time interval [0,5], so:

\int\limits^5_0 \frac{ds}{dt}=\int\limits^5_0 {\frac{1}{t+2}} \, dt\\\\s(t)=[ln|t+2|]^5_0\\\\s(t)=ln|5+2|+ln|0+2|\\\\s(t)=(ln|7|+ln|2|)\,ft

3 0
3 years ago
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