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Bess [88]
3 years ago
7

A ball has a mass of 140 g. What is the force needed to accelerate the ball at 25m/s 2

Mathematics
1 answer:
MAVERICK [17]3 years ago
4 0

Answer:

3.5N

Step-by-step explanation:

140g=0.14kg

F=ma

F=0.14×25

F=3.5N

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A circular swimming pool has a radius of 15 ft. There is a path all the way around that pool that is three feet wide. A circle h
LuckyWell [14K]

The circumference of the outer edge of the path around the pool is 113.04 ft.

<h3>What is the circumference?</h3>

The Circumference (or) perimeter of circle = 2πR. where, R is the radius of the circle.

Given

A circular swimming pool has a radius of 15 ft.

There is a path all the way around that pool that is three feet wide.

A circle has a radius of 15 feet.

A larger circle goes around the smaller circle that is 3 feet wide.

The radius of the outer edge of the path around the pool = Radius of circle + width of outer circle.

The radius of the outer edge of the path around the pool = 15 + 3

The radius of the outer edge of the path around the pool = 18ft

The circumference of the outer edge of the path around the pool is;

\rm Circumference=2\pi r\\\\Circumference = 2\times 3.14 \times 18\\\\Circumference=113.04 \ ft

Hence, the circumference of the outer edge of the path around the pool is 113.04 ft.

To know more about circumference click the link given below.

brainly.com/question/5023328

8 0
2 years ago
Let X1, . . . ,Xn be an i.i.d. random sample from a N(0, 1) population. Define Y1 = 1 n n X i=1 Xi , Y2 = 1 n n X i=1 |Xi| . Cal
nalin [4]

For each 1\le i\le n, E[X_i]=0, so that

\displaystyle E[Y_1]=E\left[\frac1n\sum_{i=1}^nX_i\right]=\frac1n\sum_{i=1}^nE[X_i]=0

Meanwhile,

\displaystyle E[Y_2]=\frac1n\sum_{i=1}^nE[|X_i|]

Each of the X_i have PDF

f_{X_i}(x)=\dfrac1{\sqrt{2\pi}}e^{-x^2/2}

for x\in\Bbb R. From this we get

E[|X_i|]=\displaystyle\frac1{\sqrt{2\pi}}\int_{-\infty}^\infty|x|e^{-x^2/2}\,\mathrm dx=\sqrt{\frac2\pi}\int_0^\infty xe^{-x^2/2}\,\mathrm dx=\sqrt{\frac2\pi}

\implies E[Y_2]=n\sqrt{\dfrac2\pi}

8 0
3 years ago
Find all the integer solutions of each system of inequalities.<br> 3-18x &lt; 0<br> 0.2-0.1x &gt; 0
Korolek [52]
3-18x & 0 0.2-0.1x do you have. A picks
5 0
2 years ago
Read 2 more answers
I need to know then measurement of c
sergey [27]
C is 666666688888 from my lookings. Jk
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3 years ago
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What is the percent of 53 out of 191 people
Tomtit [17]

Answer:

101.23

Step-by-step explanation:

Go to https://percentagecalculator.net and enter it!

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